Variations on a Theme of Chopin, Op. 22: Variation No. 1 Moderato

Recording identifiers

ISRC

DEN961530102

CopyrightID (CopyrightChains transaction hash)

0xe3db364c7461abb1172374334c3340c2e8bb85f3af3d601af2f90a413465c46a

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-22T14:03:35Z

Bitcoin block

959137

Canonical record hash

sha256:a22bdf301526a3a74ab190d6057dfb2e1ff93395e6fec17c3c610629775836e1

• 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.