ISRC USB961331738
Verified recording
USB961331738 is “Farewell Letter” by Stephen Sondheim,
registered on the CopyrightChains blockchain with CopyrightID
0xa9522991b9b5103fda255ee0f90d5822bcfb76e2af8292357e88dddefde48e38 and independently timestamped
in Bitcoin block 960334 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB961331738.
Recording identifiers
- ISRC
- USB961331738
- Title
- Farewell Letter
- Artist
- Stephen Sondheim
- CopyrightID (CopyrightChains transaction hash)
0xa9522991b9b5103fda255ee0f90d5822bcfb76e2af8292357e88dddefde48e38
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T02:19:15+00:00
- Bitcoin block
- 960334
- Canonical record hash
sha256:d84d850d06363ae89f8cc5df73ba1292cd78fdc97222fc1b305a9e691184d73d- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB961331738
- Bitcoin block existence check
- https://blockstream.info/api/block/960334