Piano Sonata No. 32 in C Minor, Op. 111: IIb. Variation I

Recording identifiers

ISRC

DEN961903583

Release date of the album this recording appears on

2020-02-21

CopyrightID (CopyrightChains transaction hash)

0x7e82018e474bc7289f8a38d3191d8c3c1104b3c334a8e40299be2c270435634b

Copyright registration time

2026-07-30T10:01:53+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T11:13:28Z

Bitcoin block

960250

Canonical record hash

sha256:219a32d4079a5fbee2ef109c15c1593dd656fd3797cd0f2d7f72eacc03678e2f

• Verify the CopyrightID on CopyrightChains
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• Recording evidence summary for ISRC DEN961903583

What this proof establishes

This recording was released in 2020, 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.