Variations on a Theme of Chopin: Variation 22. Maestoso

Recording identifiers

ISRC

GBBBA1140023

CopyrightID (CopyrightChains transaction hash)

0x990f26de9e23b0a9e3cbffa2b5f75d72e2b95fa3d986f5a388c6278cb7dbbc0d

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T02:21:55Z

Bitcoin block

960198

Canonical record hash

sha256:c55ad06a0688d171c0341773993423b5c96ba2fae51ee4297ea961fb3b28537f

• 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.