The Last Letter

Recording identifiers

ISRC

GBMFU0600032

Release date of the album this recording appears on

1988-11-01

CopyrightID (CopyrightChains transaction hash)

0xd4d9f5c6851211cc5eb5edcdb3062bf12943013ea680a53316bb039e97ac10e5

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T12:24:41Z

Bitcoin block

960397

Canonical record hash

sha256:39f1f017ecde9e7c5d02004ec05ba6b3f7c558ae335c838d8c4a9319c6f94356

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC GBMFU0600032

What this proof establishes

This recording was released in 1988, 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.