diff --git a/packages/upload-api/src/blob/accept.js b/packages/upload-api/src/blob/accept.js
index e06bc0afe..cab830ae9 100644
--- a/packages/upload-api/src/blob/accept.js
+++ b/packages/upload-api/src/blob/accept.js
@@ -34,7 +34,7 @@ export function blobAcceptProvider(context) {
       const content = createLink(rawCode, digest)
       const url = 
         /** @type {API.URI<'https:'>} */
-        (`https://w3s.link/ipfs/${content}?format=raw&origin=r2://${R2_REGION}/${R2_BUCKET}`)
+        (`https://w3s.link/ipfs/${content}?format=raw&origin=${encodeURIComponent(`r2://${R2_REGION}/${R2_BUCKET}`)}`)
 
       const locationClaim = await Assert.location.delegate({
         issuer: context.id,