Thirteen Harmonies: II. Harmony 42

Recording by John Cage.

Recording identifiers

ISRC
DEB161000303
CopyrightID (CopyrightChains transaction hash)
0x3ad0f7a8638a6d56a8923f87390470ad68fc028fe173088d1f89ae296650c0db
Copyright registration time
2026-07-30T22:17:29+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-31T00:26:26Z
Bitcoin block
960327
Canonical record hash
sha256:14ff934e5448995b5ac533dd5921ba2fc050224e73aee69043b3fd22c038c4d1

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.