Nocturne in C-Sharp Minor, B. 49

Recording identifiers

ISRC

GBAYC0902299

CopyrightID (CopyrightChains transaction hash)

0xa42e5881bc3647f05816ae44a1d2c93598fc157ac2b4d851261c5c6246963e86

Copyright registration time

2026-06-10T02:45:48+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-06-13T13:32:09Z

Bitcoin block

953520

Canonical record hash

sha256:092c92ebcfb7e7645f991dd7437e2b09c28b0796d386ca6705710690ecf5f328

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result

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.