Divertimento No. 5, Kv 439b (Kv Anhang 229): Polonaise

Recording identifiers

ISRC

NLN580512875

Release date of the album this recording appears on

2007-03-28

CopyrightID (CopyrightChains transaction hash)

0xafe3768c3aaa88123fbe90b5fbe3287817b3826dc3ac75d141a3c11565d08235

Copyright registration time

2026-06-23T09:40:22+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-02T03:55:08Z

Bitcoin block

956304

Canonical record hash

sha256:3e751dd4bd26cb0b4fa84df7eec019f7d09e201338c707b3c38dfee6bd3d1e5d

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NLN580512875

What this proof establishes

This recording was released in 2007, 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.