The Perilous Night: No. 4. —

Recording by John Cage.

Recording identifiers

ISRC
HKI190020404
CopyrightID (CopyrightChains transaction hash)
0xa6f7d846e416e47700853ec24236e0f0f71cd93ca1b7bd34e548ed4243c28c2b
Copyright registration time
2026-07-07T17:49:38+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:445b38f912ba8d1a93ce6ec055425bcc96e1dc09d0bc32917270797dc9c5bed7

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.