diff --git a/keyserver/src/uploads/uploads.js b/keyserver/src/uploads/uploads.js
--- a/keyserver/src/uploads/uploads.js
+++ b/keyserver/src/uploads/uploads.js
@@ -9,7 +9,9 @@
 import {
   type UploadMediaMetadataRequest,
   type UploadMultimediaResult,
+  type UploadMediaMetadataResult,
   uploadMultimediaResultValidator,
+  uploadMediaMetadataResultValidator,
   type UploadDeletionRequest,
   type Dimensions,
 } from 'lib/types/media-types.js';
@@ -159,10 +161,15 @@
     thumbHash: request.thumbHash,
   };
 
-  const [result] = await createUploads(viewer, [uploadInfo]);
+  const [creationResult] = await createUploads(viewer, [uploadInfo]);
+  const result: UploadMediaMetadataResult = {
+    ...creationResult,
+    blobHolder,
+    blobHash,
+  };
   return validateOutput(
     viewer.platformDetails,
-    uploadMultimediaResultValidator,
+    uploadMediaMetadataResultValidator,
     result,
   );
 }
diff --git a/lib/actions/upload-actions.js b/lib/actions/upload-actions.js
--- a/lib/actions/upload-actions.js
+++ b/lib/actions/upload-actions.js
@@ -5,6 +5,7 @@
   UploadMediaMetadataRequest,
   UploadMultimediaResult,
   Dimensions,
+  UploadMediaMetadataResult,
 } from '../types/media-types';
 import type { CallServerEndpoint } from '../utils/call-server-endpoint.js';
 import type { UploadBlob } from '../utils/upload-blob.js';
@@ -24,7 +25,9 @@
 const uploadMediaMetadata =
   (
     callServerEndpoint: CallServerEndpoint,
-  ): ((input: UploadMediaMetadataRequest) => Promise<UploadMultimediaResult>) =>
+  ): ((
+    input: UploadMediaMetadataRequest,
+  ) => Promise<UploadMediaMetadataResult>) =>
   async input => {
     const response = await callServerEndpoint('upload_media_metadata', input);
     return {
@@ -33,6 +36,8 @@
       mediaType: response.mediaType,
       dimensions: response.dimensions,
       loop: response.loop,
+      blobHolder: response.blobHolder,
+      blobHash: response.blobHash,
     };
   };
 
diff --git a/lib/types/media-types.js b/lib/types/media-types.js
--- a/lib/types/media-types.js
+++ b/lib/types/media-types.js
@@ -74,6 +74,18 @@
     loop: t.Boolean,
   });
 
+export type UploadMediaMetadataResult = {
+  ...UploadMultimediaResult,
+  +blobHolder: string,
+  +blobHash: string,
+};
+export const uploadMediaMetadataResultValidator: TInterface<UploadMediaMetadataResult> =
+  // $FlowFixMe: TInterface has no function `extend`
+  (uploadMultimediaResultValidator: any).extend({
+    blobHolder: t.String,
+    blobHash: t.String,
+  });
+
 export type UpdateMultimediaMessageMediaPayload = {
   +messageID: string,
   +currentMediaID: string,