ISRC USASX0830005
Verified recording
USASX0830005 is “Nigra sum (I am black)” by Pablo Casals,
registered on the CopyrightChains blockchain with CopyrightID
0xd3365fbaa30cc72cc16a1972bc4d90a476142bff243808ea7a171e5c35959b2b and independently timestamped
in Bitcoin block 959128 on 2026-07-22.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0830005.
Recording identifiers
- ISRC
- USASX0830005
- Title
- Nigra sum (I am black)
- Artist
- Pablo Casals
- CopyrightID (CopyrightChains transaction hash)
0xd3365fbaa30cc72cc16a1972bc4d90a476142bff243808ea7a171e5c35959b2b
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-22T12:33:25+00:00
- Bitcoin block
- 959128
- Canonical record hash
sha256:4d573b70c7038be856f0e586283676578ff46321853bea5f919ee715aa811970- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0830005
- Bitcoin block existence check
- https://blockstream.info/api/block/959128
Full record
Track page: Nigra sum (I am black) · Machine-readable JSON-LD