Requiem for the World

Recording by Zbigniew Preisner.

Recording identifiers

ISRC
PLX352400005
CopyrightID (CopyrightChains transaction hash)
0x8502abab7d113557c77575365f196bc2a68e53ff07636e7fd3c01c38632f1455
Copyright registration time
2026-07-31T01:10:59+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-31T02:19:15Z
Bitcoin block
960334
Canonical record hash
sha256:65c3dd17f4ef502abf9d14658c853a8764e2c42d155aa7b97ae43bbe00e5eda1

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.