Thirteen Harmonies: XI. Harmony 35

Recording by John Cage.

Recording identifiers

ISRC
DEB161000317
CopyrightID (CopyrightChains transaction hash)
0x4594e1a71bba278ca5c7b1597b82e3e9d2d6ae270dbebd887cc7d0a7c98a82ad
Copyright registration time
2026-07-30T23:00:47+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-31T00:26:26Z
Bitcoin block
960327
Canonical record hash
sha256:34ee35e521a757c978c93a2f2865ba5fbf73c8092b421010c0bb96a3dec5b1f2

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.