ISRC USA4N1200121
Verified recording
USA4N1200121 is “El Ofertorio” by Guillermo Cuéllar,
registered on the CopyrightChains blockchain with CopyrightID
0xba3c99c17a6b38070aa41efdfa8b2cf837c502e53e6996044d22449bbb1dc14e and independently timestamped
in Bitcoin block 960144 on 2026-07-29.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200121.
Recording identifiers
- ISRC
- USA4N1200121
- Title
- El Ofertorio
- Artist
- Guillermo Cuéllar
- CopyrightID (CopyrightChains transaction hash)
0xba3c99c17a6b38070aa41efdfa8b2cf837c502e53e6996044d22449bbb1dc14e
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-29T21:09:47+00:00
- Bitcoin block
- 960144
- Canonical record hash
sha256:229ea397451cc8a6df2165dcfdeacc9cfe3ba47142c4b1b50f5e6354d9dd6b70- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200121
- Bitcoin block existence check
- https://blockstream.info/api/block/960144