Nocturno - Instrumental

Recording by Frédéric Chopin.

Recording identifiers

ISRC
PEMG90004006
CopyrightID (CopyrightChains transaction hash)
0x02f6d1b513f09fe67d5041d1f8ba7ab62a4518ca78afb8d5c9c858697ba70cef
Copyright registration time
2026-06-21T06:40:51+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-02T03:30:09Z
Bitcoin block
956302
Canonical record hash
sha256:2f4dc7ce2bba9c63bbb7ea277e39058772b7f30db282b1029a2a1322c18407cd

What this proof establishes

This recording belongs to ProofProfile's historical evidence base derived from the pre-2022 AcousticBrainz and MusicBrainz corpus. 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.