diff --git a/netbox/core/migrations/0017_concrete_objecttype.py b/netbox/core/migrations/0017_concrete_objecttype.py
new file mode 100644
index 000000000..b64d9074f
--- /dev/null
+++ b/netbox/core/migrations/0017_concrete_objecttype.py
@@ -0,0 +1,55 @@
+import django.contrib.postgres.fields
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('contenttypes', '0002_remove_content_type_name'),
+        ('core', '0016_job_log_entries'),
+    ]
+
+    operations = [
+        # Delete the proxy model from the migration state
+        migrations.DeleteModel(
+            name='ObjectType',
+        ),
+        # Create the new concrete model
+        migrations.CreateModel(
+            name='ObjectType',
+            fields=[
+                (
+                    'contenttype_ptr',
+                    models.OneToOneField(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        parent_link=True,
+                        primary_key=True,
+                        serialize=False,
+                        to='contenttypes.contenttype',
+                        related_name='object_type'
+                    )
+                ),
+                (
+                    'public',
+                    models.BooleanField(
+                        default=False
+                    )
+                ),
+                (
+                    'features',
+                    django.contrib.postgres.fields.ArrayField(
+                        base_field=models.CharField(max_length=50),
+                        default=list,
+                        size=None
+                    )
+                ),
+            ],
+            options={
+                'verbose_name': 'object type',
+                'verbose_name_plural': 'object types',
+            },
+            bases=('contenttypes.contenttype',),
+            managers=[],
+        ),
+    ]
diff --git a/netbox/core/models/change_logging.py b/netbox/core/models/change_logging.py
index 1d1bbc07c..bf9a32f00 100644
--- a/netbox/core/models/change_logging.py
+++ b/netbox/core/models/change_logging.py
@@ -11,8 +11,8 @@ from mptt.models import MPTTModel
 from core.choices import ObjectChangeActionChoices
 from core.querysets import ObjectChangeQuerySet
 from netbox.models.features import ChangeLoggingMixin
+from netbox.models.features import has_feature
 from utilities.data import shallow_compare_dict
-from .contenttypes import ObjectType
 
 __all__ = (
     'ObjectChange',
@@ -118,7 +118,7 @@ class ObjectChange(models.Model):
         super().clean()
 
         # Validate the assigned object type
-        if self.changed_object_type not in ObjectType.objects.with_feature('change_logging'):
+        if not has_feature(self.changed_object_type, 'change_logging'):
             raise ValidationError(
                 _("Change logging is not supported for this object type ({type}).").format(
                     type=self.changed_object_type
diff --git a/netbox/core/models/contenttypes.py b/netbox/core/models/contenttypes.py
index a7d5c91af..7a59caeec 100644
--- a/netbox/core/models/contenttypes.py
+++ b/netbox/core/models/contenttypes.py
@@ -1,5 +1,8 @@
-from django.contrib.contenttypes.models import ContentType, ContentTypeManager
-from django.db.models import Q
+from django.contrib.contenttypes.models import ContentType
+from django.contrib.postgres.fields import ArrayField
+from django.core.exceptions import ObjectDoesNotExist
+from django.db import models
+from django.utils.translation import gettext as _
 
 from netbox.plugins import PluginConfig
 from netbox.registry import registry
@@ -11,45 +14,117 @@ __all__ = (
 )
 
 
-class ObjectTypeManager(ContentTypeManager):
+class ObjectTypeQuerySet(models.QuerySet):
+
+    def create(self, **kwargs):
+        # If attempting to create a new ObjectType for a given app_label & model, replace those kwargs
+        # with a reference to the ContentType (if one exists).
+        if (app_label := kwargs.get('app_label')) and (model := kwargs.get('model')):
+            try:
+                kwargs['contenttype_ptr'] = ContentType.objects.get(app_label=app_label, model=model)
+            except ObjectDoesNotExist:
+                pass
+        return super().create(**kwargs)
+
+
+class ObjectTypeManager(models.Manager):
+
+    def get_queryset(self):
+        return ObjectTypeQuerySet(self.model, using=self._db)
+
+    def get_by_natural_key(self, app_label, model):
+        """
+        Retrieve an ObjectType by its application label & model name.
+
+        This method exists to provide parity with ContentTypeManager.
+        """
+        return self.get(app_label=app_label, model=model)
+
+    # TODO: Remove in NetBox v4.5
+    def get_for_id(self, id):
+        """
+        Retrieve an ObjectType by its primary key (numeric ID).
+
+        This method exists to provide parity with ContentTypeManager.
+        """
+        return self.get(pk=id)
+
+    def _get_opts(self, model, for_concrete_model):
+        if for_concrete_model:
+            model = model._meta.concrete_model
+        return model._meta
+
+    def get_for_model(self, model, for_concrete_model=True):
+        """
+        Retrieve or create and return the ObjectType for a model.
+        """
+        from netbox.models.features import get_model_features, model_is_public
+        opts = self._get_opts(model, for_concrete_model)
+
+        try:
+            # Use .get() instead of .get_or_create() initially to ensure db_for_read is honored (Django bug #20401).
+            ot = self.get(app_label=opts.app_label, model=opts.model_name)
+        except self.model.DoesNotExist:
+            # If the ObjectType doesn't exist, create it. (Use .get_or_create() to avoid race conditions.)
+            ot = self.get_or_create(
+                app_label=opts.app_label,
+                model=opts.model_name,
+                public=model_is_public(model),
+                features=get_model_features(model.__class__),
+            )[0]
+        return ot
 
     def public(self):
         """
-        Filter the base queryset to return only ContentTypes corresponding to "public" models; those which are listed
-        in registry['models'] and intended for reference by other objects.
+        Includes only ObjectTypes for "public" models.
+
+        Filter the base queryset to return only ObjectTypes corresponding to public models; those which are intended
+        for reference by other objects within the application.
         """
-        q = Q()
-        for app_label, models in registry['models'].items():
-            q |= Q(app_label=app_label, model__in=models)
-        return self.get_queryset().filter(q)
+        return self.get_queryset().filter(public=True)
 
     def with_feature(self, feature):
         """
-        Return the ContentTypes only for models which are registered as supporting the specified feature. For example,
-        we can find all ContentTypes for models which support webhooks with
+        Return ObjectTypes only for models which support the given feature.
 
-            ContentType.objects.with_feature('event_rules')
+        Only ObjectTypes which list the specified feature will be included. Supported features are declared in
+        netbox.models.features.FEATURES_MAP. For example, we can find all ObjectTypes for models which support event
+        rules with:
+
+            ObjectType.objects.with_feature('event_rules')
         """
         if feature not in registry['model_features']:
             raise KeyError(
                 f"{feature} is not a registered model feature! Valid features are: {registry['model_features'].keys()}"
             )
-
-        q = Q()
-        for app_label, models in registry['model_features'][feature].items():
-            q |= Q(app_label=app_label, model__in=models)
-
-        return self.get_queryset().filter(q)
+        return self.get_queryset().filter(features__contains=[feature])
 
 
 class ObjectType(ContentType):
     """
     Wrap Django's native ContentType model to use our custom manager.
     """
+    contenttype_ptr = models.OneToOneField(
+        on_delete=models.CASCADE,
+        to='contenttypes.ContentType',
+        parent_link=True,
+        primary_key=True,
+        serialize=False,
+        related_name='object_type',
+    )
+    public = models.BooleanField(
+        default=False,
+    )
+    features = ArrayField(
+        base_field=models.CharField(max_length=50),
+        default=list,
+    )
+
     objects = ObjectTypeManager()
 
     class Meta:
-        proxy = True
+        verbose_name = _('object type')
+        verbose_name_plural = _('object types')
 
     @property
     def app_labeled_name(self):
diff --git a/netbox/core/models/jobs.py b/netbox/core/models/jobs.py
index 050f71921..0377ffbb1 100644
--- a/netbox/core/models/jobs.py
+++ b/netbox/core/models/jobs.py
@@ -20,6 +20,7 @@ from core.choices import JobStatusChoices
 from core.dataclasses import JobLogEntry
 from core.models import ObjectType
 from core.signals import job_end, job_start
+from netbox.models.features import has_feature
 from utilities.json import JobLogDecoder
 from utilities.querysets import RestrictedQuerySet
 from utilities.rqworker import get_queue_for_model
@@ -148,7 +149,7 @@ class Job(models.Model):
         super().clean()
 
         # Validate the assigned object type
-        if self.object_type and self.object_type not in ObjectType.objects.with_feature('jobs'):
+        if self.object_type and not has_feature(self.object_type, 'jobs'):
             raise ValidationError(
                 _("Jobs cannot be assigned to this object type ({type}).").format(type=self.object_type)
             )
diff --git a/netbox/core/signals.py b/netbox/core/signals.py
index 8ba8cc244..d1da76fbf 100644
--- a/netbox/core/signals.py
+++ b/netbox/core/signals.py
@@ -1,20 +1,21 @@
 import logging
 
 from django.contrib.contenttypes.models import ContentType
-from django.core.exceptions import ValidationError
+from django.core.exceptions import ObjectDoesNotExist, ValidationError
 from django.db.models.fields.reverse_related import ManyToManyRel, ManyToOneRel
-from django.db.models.signals import m2m_changed, post_save, pre_delete
+from django.db.models.signals import m2m_changed, post_migrate, post_save, pre_delete
 from django.dispatch import receiver, Signal
 from django.utils.translation import gettext_lazy as _
 from django_prometheus.models import model_deletes, model_inserts, model_updates
 
 from core.choices import JobStatusChoices, ObjectChangeActionChoices
 from core.events import *
+from core.models import ObjectType
 from extras.events import enqueue_event
 from extras.utils import run_validators
 from netbox.config import get_config
 from netbox.context import current_request, events_queue
-from netbox.models.features import ChangeLoggingMixin
+from netbox.models.features import ChangeLoggingMixin, get_model_features, model_is_public
 from utilities.exceptions import AbortRequest
 from .models import ConfigRevision, DataSource, ObjectChange
 
@@ -38,6 +39,37 @@ post_sync = Signal()
 clear_events = Signal()
 
 
+#
+# Object types
+#
+
+@receiver(post_migrate)
+def update_object_types(sender, **kwargs):
+    """
+    Create or update the corresponding ObjectType for each model within the migrated app.
+    """
+    for model in sender.get_models():
+        app_label, model_name = model._meta.label_lower.split('.')
+
+        # Determine whether model is public and its supported features
+        is_public = model_is_public(model)
+        features = get_model_features(model)
+
+        # Create/update the ObjectType for the model
+        try:
+            ot = ObjectType.objects.get_by_natural_key(app_label=app_label, model=model_name)
+            ot.public = is_public
+            ot.features = features
+            ot.save()
+        except ObjectDoesNotExist:
+            ObjectType.objects.create(
+                app_label=app_label,
+                model=model_name,
+                public=is_public,
+                features=features,
+            )
+
+
 #
 # Change logging & event handling
 #
diff --git a/netbox/dcim/models/cables.py b/netbox/dcim/models/cables.py
index 0a28d5acb..32e26f982 100644
--- a/netbox/dcim/models/cables.py
+++ b/netbox/dcim/models/cables.py
@@ -1,6 +1,7 @@
 import itertools
 
 from django.contrib.contenttypes.fields import GenericForeignKey
+from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import ValidationError
 from django.db import models
 from django.dispatch import Signal
@@ -479,13 +480,13 @@ class CablePath(models.Model):
     def origin_type(self):
         if self.path:
             ct_id, _ = decompile_path_node(self.path[0][0])
-            return ObjectType.objects.get_for_id(ct_id)
+            return ContentType.objects.get_for_id(ct_id)
 
     @property
     def destination_type(self):
         if self.is_complete:
             ct_id, _ = decompile_path_node(self.path[-1][0])
-            return ObjectType.objects.get_for_id(ct_id)
+            return ContentType.objects.get_for_id(ct_id)
 
     @property
     def _path_decompiled(self):
diff --git a/netbox/dcim/models/devices.py b/netbox/dcim/models/devices.py
index 264c1e025..78fd881a7 100644
--- a/netbox/dcim/models/devices.py
+++ b/netbox/dcim/models/devices.py
@@ -4,6 +4,7 @@ import yaml
 from functools import cached_property
 
 from django.contrib.contenttypes.fields import GenericForeignKey, GenericRelation
+from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import ValidationError
 from django.core.files.storage import default_storage
 from django.core.validators import MaxValueValidator, MinValueValidator
@@ -15,7 +16,6 @@ from django.urls import reverse
 from django.utils.safestring import mark_safe
 from django.utils.translation import gettext_lazy as _
 
-from core.models import ObjectType
 from dcim.choices import *
 from dcim.constants import *
 from dcim.fields import MACAddressField
@@ -1328,7 +1328,7 @@ class MACAddress(PrimaryModel):
         super().clean()
         if self._original_assigned_object_id and self._original_assigned_object_type_id:
             assigned_object = self.assigned_object
-            ct = ObjectType.objects.get_for_id(self._original_assigned_object_type_id)
+            ct = ContentType.objects.get_for_id(self._original_assigned_object_type_id)
             original_assigned_object = ct.get_object_for_this_type(pk=self._original_assigned_object_id)
 
             if (
diff --git a/netbox/extras/events.py b/netbox/extras/events.py
index d7c642c4e..f8447fdb2 100644
--- a/netbox/extras/events.py
+++ b/netbox/extras/events.py
@@ -11,7 +11,7 @@ from django_rq import get_queue
 from core.events import *
 from netbox.config import get_config
 from netbox.constants import RQ_QUEUE_DEFAULT
-from netbox.registry import registry
+from netbox.models.features import has_feature
 from users.models import User
 from utilities.api import get_serializer_for_model
 from utilities.rqworker import get_rq_retry
@@ -55,11 +55,12 @@ def enqueue_event(queue, instance, user, request_id, event_type):
     Enqueue a serialized representation of a created/updated/deleted object for the processing of
     events once the request has completed.
     """
-    # Determine whether this type of object supports event rules
+    # Bail if this type of object does not support event rules
+    if not has_feature(instance, 'event_rules'):
+        return
+
     app_label = instance._meta.app_label
     model_name = instance._meta.model_name
-    if model_name not in registry['model_features']['event_rules'].get(app_label, []):
-        return
 
     assert instance.pk is not None
     key = f'{app_label}.{model_name}:{instance.pk}'
diff --git a/netbox/extras/migrations/0131_concrete_objecttype.py b/netbox/extras/migrations/0131_concrete_objecttype.py
new file mode 100644
index 000000000..b93bdd882
--- /dev/null
+++ b/netbox/extras/migrations/0131_concrete_objecttype.py
@@ -0,0 +1,56 @@
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('core', '0017_concrete_objecttype'),
+        ('extras', '0130_imageattachment_description'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='Tag',
+            name='object_types',
+            field=models.ManyToManyField(blank=True, related_name='+', to='core.objecttype'),
+        ),
+        migrations.AlterField(
+            model_name='CustomField',
+            name='related_object_type',
+            field=models.ForeignKey(
+                blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to='core.objecttype'
+            ),
+        ),
+        migrations.AlterField(
+            model_name='CustomField',
+            name='object_types',
+            field=models.ManyToManyField(related_name='custom_fields', to='core.objecttype'),
+        ),
+        migrations.AlterField(
+            model_name='EventRule',
+            name='object_types',
+            field=models.ManyToManyField(related_name='event_rules', to='core.objecttype'),
+        ),
+        migrations.AlterField(
+            model_name='CustomLink',
+            name='object_types',
+            field=models.ManyToManyField(related_name='custom_links', to='core.objecttype'),
+        ),
+        migrations.AlterField(
+            model_name='ExportTemplate',
+            name='object_types',
+            field=models.ManyToManyField(related_name='export_templates', to='core.objecttype'),
+        ),
+        migrations.AlterField(
+            model_name='SavedFilter',
+            name='object_types',
+            field=models.ManyToManyField(related_name='saved_filters', to='core.objecttype'),
+        ),
+        migrations.AlterField(
+            model_name='TableConfig',
+            name='object_type',
+            field=models.ForeignKey(
+                on_delete=django.db.models.deletion.CASCADE, related_name='table_configs', to='core.objecttype'
+            ),
+        ),
+    ]
diff --git a/netbox/extras/models/configs.py b/netbox/extras/models/configs.py
index 8d6b8d999..f92c66632 100644
--- a/netbox/extras/models/configs.py
+++ b/netbox/extras/models/configs.py
@@ -1,15 +1,16 @@
-from django.apps import apps
+from collections import defaultdict
+
 from django.conf import settings
 from django.core.validators import ValidationError
 from django.db import models
 from django.urls import reverse
 from django.utils.translation import gettext_lazy as _
 
+from core.models import ObjectType
 from extras.models.mixins import RenderTemplateMixin
 from extras.querysets import ConfigContextQuerySet
 from netbox.models import ChangeLoggedModel
 from netbox.models.features import CloningMixin, CustomLinksMixin, ExportTemplatesMixin, SyncedDataMixin, TagsMixin
-from netbox.registry import registry
 from utilities.data import deepmerge
 
 __all__ = (
@@ -239,15 +240,12 @@ class ConfigTemplate(
     sync_data.alters_data = True
 
     def get_context(self, context=None, queryset=None):
-        _context = dict()
-        for app, model_names in registry['models'].items():
-            _context.setdefault(app, {})
-            for model_name in model_names:
-                try:
-                    model = apps.get_registered_model(app, model_name)
-                    _context[app][model.__name__] = model
-                except LookupError:
-                    pass
+        _context = defaultdict(dict)
+
+        # Populate all public models for reference within the template
+        for object_type in ObjectType.objects.public():
+            if model := object_type.model_class():
+                _context[object_type.app_label][model.__name__] = model
 
         # Apply the provided context data, if any
         if context is not None:
diff --git a/netbox/extras/models/models.py b/netbox/extras/models/models.py
index 2fdc1ffe3..a486ec1ee 100644
--- a/netbox/extras/models/models.py
+++ b/netbox/extras/models/models.py
@@ -12,17 +12,16 @@ from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
 from rest_framework.utils.encoders import JSONEncoder
 
-from core.models import ObjectType
 from extras.choices import *
 from extras.conditions import ConditionSet, InvalidCondition
 from extras.constants import *
-from extras.utils import image_upload
 from extras.models.mixins import RenderTemplateMixin
+from extras.utils import image_upload
 from netbox.config import get_config
 from netbox.events import get_event_type_choices
 from netbox.models import ChangeLoggedModel
 from netbox.models.features import (
-    CloningMixin, CustomFieldsMixin, CustomLinksMixin, ExportTemplatesMixin, SyncedDataMixin, TagsMixin
+    CloningMixin, CustomFieldsMixin, CustomLinksMixin, ExportTemplatesMixin, SyncedDataMixin, TagsMixin, has_feature
 )
 from utilities.html import clean_html
 from utilities.jinja2 import render_jinja2
@@ -707,7 +706,7 @@ class ImageAttachment(ChangeLoggedModel):
         super().clean()
 
         # Validate the assigned object type
-        if self.object_type not in ObjectType.objects.with_feature('image_attachments'):
+        if not has_feature(self.object_type, 'image_attachments'):
             raise ValidationError(
                 _("Image attachments cannot be assigned to this object type ({type}).").format(type=self.object_type)
             )
@@ -807,7 +806,7 @@ class JournalEntry(CustomFieldsMixin, CustomLinksMixin, TagsMixin, ExportTemplat
         super().clean()
 
         # Validate the assigned object type
-        if self.assigned_object_type not in ObjectType.objects.with_feature('journaling'):
+        if not has_feature(self.assigned_object_type, 'journaling'):
             raise ValidationError(
                 _("Journaling is not supported for this object type ({type}).").format(type=self.assigned_object_type)
             )
@@ -863,7 +862,7 @@ class Bookmark(models.Model):
         super().clean()
 
         # Validate the assigned object type
-        if self.object_type not in ObjectType.objects.with_feature('bookmarks'):
+        if not has_feature(self.object_type, 'bookmarks'):
             raise ValidationError(
                 _("Bookmarks cannot be assigned to this object type ({type}).").format(type=self.object_type)
             )
diff --git a/netbox/extras/models/notifications.py b/netbox/extras/models/notifications.py
index 44874a4c8..c8e8c4fd8 100644
--- a/netbox/extras/models/notifications.py
+++ b/netbox/extras/models/notifications.py
@@ -7,9 +7,9 @@ from django.db import models
 from django.urls import reverse
 from django.utils.translation import gettext_lazy as _
 
-from core.models import ObjectType
 from extras.querysets import NotificationQuerySet
 from netbox.models import ChangeLoggedModel
+from netbox.models.features import has_feature
 from netbox.registry import registry
 from users.models import User
 from utilities.querysets import RestrictedQuerySet
@@ -94,7 +94,7 @@ class Notification(models.Model):
         super().clean()
 
         # Validate the assigned object type
-        if self.object_type not in ObjectType.objects.with_feature('notifications'):
+        if not has_feature(self.object_type, 'notifications'):
             raise ValidationError(
                 _("Objects of this type ({type}) do not support notifications.").format(type=self.object_type)
             )
@@ -235,7 +235,7 @@ class Subscription(models.Model):
         super().clean()
 
         # Validate the assigned object type
-        if self.object_type not in ObjectType.objects.with_feature('notifications'):
+        if not has_feature(self.object_type, 'notifications'):
             raise ValidationError(
                 _("Objects of this type ({type}) do not support notifications.").format(type=self.object_type)
             )
diff --git a/netbox/extras/signals.py b/netbox/extras/signals.py
index 10c3f73c5..611e61e5e 100644
--- a/netbox/extras/signals.py
+++ b/netbox/extras/signals.py
@@ -8,7 +8,7 @@ from core.signals import job_end, job_start
 from extras.events import process_event_rules
 from extras.models import EventRule, Notification, Subscription
 from netbox.config import get_config
-from netbox.registry import registry
+from netbox.models.features import has_feature
 from netbox.signals import post_clean
 from utilities.exceptions import AbortRequest
 from .models import CustomField, TaggedItem
@@ -150,17 +150,25 @@ def notify_object_changed(sender, instance, **kwargs):
         event_type = OBJECT_DELETED
 
     # Skip unsupported object types
-    ct = ContentType.objects.get_for_model(instance)
-    if ct.model not in registry['model_features']['notifications'].get(ct.app_label, []):
+    if not has_feature(instance, 'notifications'):
         return
 
+    ct = ContentType.objects.get_for_model(instance)
+
     # Find all subscribed Users
-    subscribed_users = Subscription.objects.filter(object_type=ct, object_id=instance.pk).values_list('user', flat=True)
+    subscribed_users = Subscription.objects.filter(
+        object_type=ct,
+        object_id=instance.pk
+    ).values_list('user', flat=True)
     if not subscribed_users:
         return
 
     # Delete any existing Notifications for the object
-    Notification.objects.filter(object_type=ct, object_id=instance.pk, user__in=subscribed_users).delete()
+    Notification.objects.filter(
+        object_type=ct,
+        object_id=instance.pk,
+        user__in=subscribed_users
+    ).delete()
 
     # Create Notifications for Subscribers
     Notification.objects.bulk_create([
diff --git a/netbox/ipam/models/ip.py b/netbox/ipam/models/ip.py
index db116e9e4..73c3310dc 100644
--- a/netbox/ipam/models/ip.py
+++ b/netbox/ipam/models/ip.py
@@ -1,5 +1,6 @@
 import netaddr
 from django.contrib.contenttypes.fields import GenericForeignKey
+from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import ValidationError
 from django.db import models
 from django.db.models import F
@@ -7,7 +8,6 @@ from django.db.models.functions import Cast
 from django.utils.functional import cached_property
 from django.utils.translation import gettext_lazy as _
 
-from core.models import ObjectType
 from dcim.models.mixins import CachedScopeMixin
 from ipam.choices import *
 from ipam.constants import *
@@ -917,7 +917,7 @@ class IPAddress(ContactsMixin, PrimaryModel):
 
         if self._original_assigned_object_id and self._original_assigned_object_type_id:
             parent = getattr(self.assigned_object, 'parent_object', None)
-            ct = ObjectType.objects.get_for_id(self._original_assigned_object_type_id)
+            ct = ContentType.objects.get_for_id(self._original_assigned_object_type_id)
             original_assigned_object = ct.get_object_for_this_type(pk=self._original_assigned_object_id)
             original_parent = getattr(original_assigned_object, 'parent_object', None)
 
diff --git a/netbox/netbox/models/features.py b/netbox/netbox/models/features.py
index 79145ce70..7f471a878 100644
--- a/netbox/netbox/models/features.py
+++ b/netbox/netbox/models/features.py
@@ -3,6 +3,7 @@ from collections import defaultdict
 from functools import cached_property
 
 from django.contrib.contenttypes.fields import GenericRelation
+from django.contrib.contenttypes.models import ContentType
 from django.core.validators import ValidationError
 from django.db import models
 from django.db.models import Q
@@ -32,12 +33,16 @@ __all__ = (
     'CustomValidationMixin',
     'EventRulesMixin',
     'ExportTemplatesMixin',
+    'FEATURES_MAP',
     'ImageAttachmentsMixin',
     'JobsMixin',
     'JournalingMixin',
     'NotificationsMixin',
     'SyncedDataMixin',
     'TagsMixin',
+    'get_model_features',
+    'has_feature',
+    'model_is_public',
     'register_models',
 )
 
@@ -633,11 +638,38 @@ FEATURES_MAP = {
     'tags': TagsMixin,
 }
 
+# TODO: Remove in NetBox v4.5
 registry['model_features'].update({
     feature: defaultdict(set) for feature in FEATURES_MAP.keys()
 })
 
 
+def model_is_public(model):
+    return not getattr(model, '_netbox_private', False)
+
+
+def get_model_features(model):
+    return [
+        feature for feature, cls in FEATURES_MAP.items() if issubclass(model, cls)
+    ]
+
+
+def has_feature(model_or_ct, feature):
+    """
+    Returns True if the model supports the specified feature.
+    """
+    # If an ObjectType was passed, we can use it directly
+    if type(model_or_ct) is ObjectType:
+        ot = model_or_ct
+    # If a ContentType was passed, resolve its model class
+    elif type(model_or_ct) is ContentType:
+        ot = ObjectType.objects.get_for_model(model_or_ct.model_class())
+    # For anything else, look up the ObjectType
+    else:
+        ot = ObjectType.objects.get_for_model(model_or_ct)
+    return feature in ot.features
+
+
 def register_models(*models):
     """
     Register one or more models in NetBox. This entails:
@@ -653,10 +685,12 @@ def register_models(*models):
     for model in models:
         app_label, model_name = model._meta.label_lower.split('.')
 
+        # TODO: Remove in NetBox v4.5
         # Register public models
         if not getattr(model, '_netbox_private', False):
             registry['models'][app_label].add(model_name)
 
+        # TODO: Remove in NetBox v4.5
         # Record each applicable feature for the model in the registry
         features = {
             feature for feature, cls in FEATURES_MAP.items() if issubclass(model, cls)
diff --git a/netbox/netbox/tests/test_plugins.py b/netbox/netbox/tests/test_plugins.py
index 264c8e6f9..9f2033936 100644
--- a/netbox/netbox/tests/test_plugins.py
+++ b/netbox/netbox/tests/test_plugins.py
@@ -6,6 +6,7 @@ from django.test import Client, TestCase, override_settings
 from django.urls import reverse
 
 from core.choices import JobIntervalChoices
+from core.models import ObjectType
 from netbox.tests.dummy_plugin import config as dummy_config
 from netbox.tests.dummy_plugin.data_backends import DummyBackend
 from netbox.tests.dummy_plugin.jobs import DummySystemJob
@@ -23,8 +24,9 @@ class PluginTest(TestCase):
         self.assertIn('netbox.tests.dummy_plugin.DummyPluginConfig', settings.INSTALLED_APPS)
 
     def test_model_registration(self):
-        self.assertIn('dummy_plugin', registry['models'])
-        self.assertIn('dummymodel', registry['models']['dummy_plugin'])
+        self.assertTrue(
+            ObjectType.objects.filter(app_label='dummy_plugin', model='dummymodel').exists()
+        )
 
     def test_models(self):
         from netbox.tests.dummy_plugin.models import DummyModel
diff --git a/netbox/tenancy/models/contacts.py b/netbox/tenancy/models/contacts.py
index 34e444ee7..19ffb2b0b 100644
--- a/netbox/tenancy/models/contacts.py
+++ b/netbox/tenancy/models/contacts.py
@@ -4,9 +4,8 @@ from django.db import models
 from django.urls import reverse
 from django.utils.translation import gettext_lazy as _
 
-from core.models import ObjectType
 from netbox.models import ChangeLoggedModel, NestedGroupModel, OrganizationalModel, PrimaryModel
-from netbox.models.features import CustomFieldsMixin, ExportTemplatesMixin, TagsMixin
+from netbox.models.features import CustomFieldsMixin, ExportTemplatesMixin, TagsMixin, has_feature
 from tenancy.choices import *
 
 __all__ = (
@@ -151,7 +150,7 @@ class ContactAssignment(CustomFieldsMixin, ExportTemplatesMixin, TagsMixin, Chan
         super().clean()
 
         # Validate the assigned object type
-        if self.object_type not in ObjectType.objects.with_feature('contacts'):
+        if not has_feature(self.object_type, 'contacts'):
             raise ValidationError(
                 _("Contacts cannot be assigned to this object type ({type}).").format(type=self.object_type)
             )
diff --git a/netbox/users/migrations/0010_concrete_objecttype.py b/netbox/users/migrations/0010_concrete_objecttype.py
new file mode 100644
index 000000000..bfd9e20e5
--- /dev/null
+++ b/netbox/users/migrations/0010_concrete_objecttype.py
@@ -0,0 +1,17 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0017_concrete_objecttype'),
+        ('users', '0009_update_group_perms'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='ObjectPermission',
+            name='object_types',
+            field=models.ManyToManyField(related_name='object_permissions', to='core.objecttype'),
+        ),
+    ]