Four Walls, Act I: VI

Recording by John Cage.

Recording identifiers

ISRC
BER182279308
CopyrightID (CopyrightChains transaction hash)
0x7e951b1a9433963326c6878fc5a438f3d7982c2ef8a81f0e7a97628ec68dca18
Copyright registration time
2026-07-07T13:42:11+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:f643e437d03566e7e221a919d66aade368be4f6b672f51904265cabf68a753c9

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.