ISRC GBBFT9700031
Verified recording
GBBFT9700031 is “Letter of Che to Fidel” by Fidel Castro,
registered on the CopyrightChains blockchain with CopyrightID
0xd7a702e6658d64fbbc95478ae56202cec5dbefac4a7407b86807fb461115d11f and independently timestamped
in Bitcoin block 960441 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBFT9700031.
Recording identifiers
- ISRC
- GBBFT9700031
- Title
- Letter of Che to Fidel
- Artist
- Fidel Castro
- CopyrightID (CopyrightChains transaction hash)
0xd7a702e6658d64fbbc95478ae56202cec5dbefac4a7407b86807fb461115d11f
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T17:29:52+00:00
- Bitcoin block
- 960441
- Canonical record hash
sha256:a3fcd9f113e8451e5222d228e903c03e0a6c54dff6bb7a84decbe68b29aa048e- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBFT9700031
- Bitcoin block existence check
- https://blockstream.info/api/block/960441
Full record
Track page: Letter of Che to Fidel · Machine-readable JSON-LD