Nocturne No. 4 in F Major, Op. 15 No. 1

Recording identifiers

ISRC

DEF058101040

Release date of the album this recording appears on

2025-02-21

CopyrightID (CopyrightChains transaction hash)

0x1b4647b9442bb60a138acfefa2b5967b5d9c1e2ebffb1ed9cda65150e91ff44e

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-08-01T04:30:37Z

Bitcoin block

960509

Canonical record hash

sha256:0afb5ccee23a6df830bad733120707d497491daa83b06dfdc36b6052249b1976

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DEF058101040

What this proof establishes

This recording was released in 2025. 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.