diff --git a/src/sentry/lang/native/sources.py b/src/sentry/lang/native/sources.py
index 91e2de400b7a3..0dba3cac14452 100644
--- a/src/sentry/lang/native/sources.py
+++ b/src/sentry/lang/native/sources.py
@@ -2,6 +2,7 @@
 import logging
 import sys
 from copy import deepcopy
+from datetime import datetime
 
 import jsonschema
 import sentry_sdk
@@ -10,7 +11,8 @@
 
 from sentry import features, options
 from sentry.auth.system import get_system_token
-from sentry.utils import json, safe
+from sentry.models.project import Project
+from sentry.utils import json, redis, safe
 
 logger = logging.getLogger(__name__)
 
@@ -115,6 +117,22 @@
     },
 }
 
+default_cluster = redis.redis_clusters.get("default")
+LAST_UPLOAD_TTL = 24 * 3600
+
+
+def _last_upload_key(project_id: int) -> str:
+    return f"symbols:last_upload:{project_id}"
+
+
+def record_last_upload(project: Project):
+    timestamp = int(datetime.utcnow().timestamp() * 1000)
+    default_cluster.setex(_last_upload_key(project.id), LAST_UPLOAD_TTL, timestamp)
+
+
+def get_last_upload(project_id: int):
+    return default_cluster.get(_last_upload_key(project_id))
+
 
 class InvalidSourcesError(Exception):
     pass
@@ -137,7 +155,7 @@ def get_internal_url_prefix() -> str:
     return internal_url_prefix.rstrip("/")
 
 
-def get_internal_source(project):
+def get_internal_source(project: Project):
     """
     Returns the source configuration for a Sentry project.
     """
@@ -149,6 +167,9 @@ def get_internal_source(project):
         ),
     )
 
+    if last_upload := get_last_upload(project.id):
+        sentry_source_url += f"?_last_upload={last_upload}"
+
     return {
         "type": "sentry",
         "id": INTERNAL_SOURCE_NAME,
@@ -157,7 +178,7 @@ def get_internal_source(project):
     }
 
 
-def get_internal_artifact_lookup_source_url(project):
+def get_internal_artifact_lookup_source_url(project: Project):
     """
     Returns the url used as a part of source configuration for the Sentry artifact-lookup API.
     """
@@ -173,7 +194,7 @@ def get_internal_artifact_lookup_source_url(project):
     )
 
 
-def get_internal_artifact_lookup_source(project):
+def get_internal_artifact_lookup_source(project: Project):
     """
     Returns the source configuration for the Sentry artifact-lookup API.
     """
@@ -185,7 +206,7 @@ def get_internal_artifact_lookup_source(project):
     }
 
 
-def is_internal_source_id(source_id):
+def is_internal_source_id(source_id: str):
     """Determines if a DIF object source identifier is reserved for internal sentry use.
 
     This is trivial, but multiple functions in this file need to use the same definition.
diff --git a/src/sentry/models/debugfile.py b/src/sentry/models/debugfile.py
index f1fb902705ab1..7de64fc1c41ae 100644
--- a/src/sentry/models/debugfile.py
+++ b/src/sentry/models/debugfile.py
@@ -43,6 +43,7 @@
     region_silo_only_model,
     sane_repr,
 )
+from sentry.lang.native.sources import record_last_upload
 from sentry.models.files.file import File
 from sentry.models.files.utils import clear_cached_files
 from sentry.reprocessing import bump_reprocessing_revision, resolve_processing_issue
@@ -615,6 +616,7 @@ def create_files_from_dif_zip(
         rv = create_debug_file_from_dif(to_create, project)
 
         # Uploading new dsysm changes the reprocessing revision
+        record_last_upload(project)
         bump_reprocessing_revision(project)
 
         return rv
diff --git a/src/sentry/tasks/assemble.py b/src/sentry/tasks/assemble.py
index e797e7de1947e..4bcd9b0a8153f 100644
--- a/src/sentry/tasks/assemble.py
+++ b/src/sentry/tasks/assemble.py
@@ -185,6 +185,7 @@ def assemble_dif(project_id, name, checksum, chunks, debug_id=None, **kwargs):
     """
     Assembles uploaded chunks into a ``ProjectDebugFile``.
     """
+    from sentry.lang.native.sources import record_last_upload
     from sentry.models import BadDif, Project, debugfile
     from sentry.reprocessing import bump_reprocessing_revision
 
@@ -239,6 +240,7 @@ def assemble_dif(project_id, name, checksum, chunks, debug_id=None, **kwargs):
                 # and might resolve processing issues. If the file was not
                 # created, someone else has created it and will bump the
                 # revision instead.
+                record_last_upload(project)
                 bump_reprocessing_revision(project, use_buffer=True)
     except Exception:
         set_assemble_status(