Letter of Che to Fidel

Recording identifiers

ISRC

GBBFT9700031

Release date of the album this recording appears on

1997-01-01

CopyrightID (CopyrightChains transaction hash)

0xd7a702e6658d64fbbc95478ae56202cec5dbefac4a7407b86807fb461115d11f

Copyright registration time

2026-07-31T16:55:44+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T17:29:52Z

Bitcoin block

960441

Canonical record hash

sha256:a3fcd9f113e8451e5222d228e903c03e0a6c54dff6bb7a84decbe68b29aa048e

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC GBBFT9700031

What this proof establishes

This recording was released in 1997, before generative AI. ProofProfile's catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and ISRC is the stable recording-level bridge from that source corpus to the authoritative cc-db-prod track record.

CopyrightChains and Bitcoin OpenTimestamps make the exact committed record independently verifiable today. The cryptographic proof does not by itself establish authorship or ownership of the underlying recording.

Read the complete pre-generative-AI provenance and verification method.