12 Variations on "Ein Mädchen oder Weibchen" for Cello and Piano, Op. 66: Variation VII

Recording identifiers

ISRC

GBBBA0345608

CopyrightID (CopyrightChains transaction hash)

0x6f5d83ce7a124e7d32de57e44d3f140fff10ca2bd9a9ea4f2a8834feca0391cc

Copyright registration time

2026-06-27T22:38:03+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-02T03:55:08Z

Bitcoin block

956304

Canonical record hash

sha256:f69fb01bb3d96d56ac0bbf3fe8c69c7db31750ded7af73172298571429f09e0b

• Verify the CopyrightID on CopyrightChains
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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.