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

Recording identifiers

ISRC

NZTR00400036

Release date of the album this recording appears on

2000-01-01

CopyrightID (CopyrightChains transaction hash)

0xf00250183dfe725869e52e0a2dd6b4f8eadb6dd7d7c13de37ba94b1201e5bc75

Copyright registration time

2026-07-31T17:13:54+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T17:29:52Z

Bitcoin block

960441

Canonical record hash

sha256:c4cefe33e1a4e17228acaf928c5b02d032334473a3521f80404fb994fdb8996e

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NZTR00400036

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.