Chopin Nocturne Op. 15, No. 1 F Major

Recording identifiers

ISRC

US2BB0900057

Release date of the album this recording appears on

2009-10-06

CopyrightID (CopyrightChains transaction hash)

0x81fe504610a83d6840d3813bf3cbc6a63c0c718fdbe13aa28ed2fad3092fd1d0

Copyright registration time

2026-06-19T03:35:41+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-02T03:30:09Z

Bitcoin block

956302

Canonical record hash

sha256:cc20f60b4a2aed798f8664e58740fd897b71783416d651ac9c64df8908974cd2

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC US2BB0900057

What this proof establishes

This recording was released in 2009, 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.