Nocturnes, Op. 9: No. 1, Larghetto in B-Flat Minor

Recording identifiers

ISRC

DEA809200701

CopyrightID (CopyrightChains transaction hash)

0x1f08cbd21a7db3fdf0b0ffb085a2c212527de4fb8136a1b0656b966f27320b2c

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T12:24:41Z

Bitcoin block

960397

Canonical record hash

sha256:40690281c7a5aa69be633c8557edd91921e86f8a88e5a1feb56f44a72aa4f456

• 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.