Sonata V

Recording by John Cage.

Recording identifiers

ISRC
GBBBA7470706
CopyrightID (CopyrightChains transaction hash)
0x2554bd5c22554b638da8387515f6dd6fa90bdc688185d8dc88f0e1c6b7bc5396
Copyright registration time
2026-07-07T21:13:40+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:39:04Z
Bitcoin block
957122
Canonical record hash
sha256:a58cf434a9451ebc8f00a3ba2da1349b7ee12262c04e6474de8e96689ea4899b

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.