Thirteen Harmonies: IV. Harmony 21

Recording by John Cage.

Recording identifiers

ISRC
DEB161000307
CopyrightID (CopyrightChains transaction hash)
0x481c763fa8dd490d7be7682e3cb19485e27e0ac4facf9e40d48fedbbcd42e26d
Copyright registration time
2026-07-30T08:03:46+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-30T08:30:10Z
Bitcoin block
960229
Canonical record hash
sha256:62b8c3aa5185a62316cc697a2ecd061488810f63d5c6cf1ff2a0a0b69c91f749

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.