Occasional Pieces for Piano: 4 Preludes (1942-44): I. —

Recording identifiers

ISRC

NZTR00400034

Release date of the album this recording appears on

2000-01-01

CopyrightID (CopyrightChains transaction hash)

0x81181b3283904d4b96963df146fdd9eeeab46f1e5169e0b2cf2664e233ea91c4

Copyright registration time

2026-07-31T06:47:31+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T06:58:00Z

Bitcoin block

960362

Canonical record hash

sha256:a2331f4c9c2a32267b1c6e3ade7d25ddfabf7245af46f18542136025f7e89f39

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NZTR00400034

What this proof establishes

This recording was released in 2000, before generative AI. ProofProfile's catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and 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.