Hymns & Variations: Hymn B (After W. Billing's "Heath")

Recording by John Cage.

Recording identifiers

ISRC
FINDE2200009
CopyrightID (CopyrightChains transaction hash)
0x1ebfdb17b64b8f8aaa65d4b27a6f7d43ad600c274378b3e65257eb71b176d290
Copyright registration time
2026-07-07T08:33:38+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:9559052e608895ff57ec1784fd7c3eb5788aa78547e97eebbeb3b62919d083a4

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.