Quarter Tone Experiments - Rehearsal - Hamburg, February 1972 [Restauración 2023]

Recording identifiers

ISRC

ARU8P2300072

Release date of the album this recording appears on

2023-04-12

CopyrightID (CopyrightChains transaction hash)

0x505ed7711da6c90e3c22414a3832517ebc5be75794a95cd9b8c9581ae38c20c6

Copyright registration time

2026-07-07T04:44:21+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:20:19Z

Bitcoin block

957118

Canonical record hash

sha256:5d5537ff760582fb988cc596521ea94f151b1d339f526efcc0d27bad34c3e30e

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC ARU8P2300072

What this proof establishes

This recording was released in 2023. ProofProfile's artist catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and this recording entered the record through cc-db-prod's ISRC-linked registration. Its provenance rests on the dates stated above rather than on the era of that source corpus.

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.