27'10.554 for a Percussionist - Version by Fritz Hauser

Recording by John Cage.

Recording identifiers

ISRC
ITLF52311799
CopyrightID (CopyrightChains transaction hash)
0x555ddaf0bcff849ba09767fbbc6e077ac498e3b8c72177889ee655de692e1e52
Copyright registration time
2026-07-07T13:35:20+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:e96335a74e1786b0bbf0e565e2fb540562fdaf0246f883821cb0d309627f10c3

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.