Four Walls, Act I: V

Recording by John Cage.

Recording identifiers

ISRC
BER182279307
CopyrightID (CopyrightChains transaction hash)
0x3f585e93998d6ea9737c63ddd17d8ddc295ddd529b6f8ae0b742df4031bfd9c4
Copyright registration time
2026-07-07T17:06:31+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:22:41Z
Bitcoin block
957120
Canonical record hash
sha256:9070116bd80af31ff1f95cce0a4633f7a34897ba7c156c3512942780d545037b

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.