Four Walls, Act I: III

Recording by John Cage.

Recording identifiers

ISRC
BER182279303
CopyrightID (CopyrightChains transaction hash)
0x914aefcb3dcd91f36e59a47e08ed9427ad8bf2dc6c810d0b9ec986d969efd4ab
Copyright registration time
2026-07-07T07:02:04+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:ef883219d72bcc79c0cdb579d5417a93314a21d0b8b3bbc6b23aa0f4981429f5

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.