Hymns & Variations: Var. 6

Recording by John Cage.

Recording identifiers

ISRC
FINDE2200015
CopyrightID (CopyrightChains transaction hash)
0x791cf989d24f069fffb2b40857f9ec90bc474d952a23ad0d3dd7afeb74a1e5f1
Copyright registration time
2026-07-07T10:54:08+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:a7a444a0b127b654a93f9ed46003c51fc8547d86d1594d06f4d6825d1f50bc5a

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.