Sonata I

Recording by John Cage.

Recording identifiers

ISRC
GBBBA7470701
CopyrightID (CopyrightChains transaction hash)
0x04e384c56b7c7237c210cd1855da73f85c8aa191d92f0af70a890ec439d46f58
Copyright registration time
2026-07-07T15:34:10+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:53:27Z
Bitcoin block
957124
Canonical record hash
sha256:6a2b284f93ab964c4feb4230258b5b7ee29c1f490027490849af16054a128b47

What this proof establishes

This recording belongs to ProofProfile's historical evidence base derived from the pre-2022 AcousticBrainz and MusicBrainz corpus. 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.