Piano Sonata No. 32 in C Minor, Op. 111: I. Maestoso - Allegro con brio ed appassionato

Recording identifiers

ISRC

DEF058100871

Release date of the album this recording appears on

1982-01-01

CopyrightID (CopyrightChains transaction hash)

0xcc76640a2509dd82f0ea5eebdf65817359d945e65936bb7d0c0b0802ca9cff97

Copyright registration time

2026-07-22T14:35:18+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-22T15:38:35Z

Bitcoin block

959144

Canonical record hash

sha256:d1c85e1c0354fe9321943bbe2efd5afd57595c49be9070985e64b03d692b648b

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DEF058100871

What this proof establishes

This recording was released in 1982, 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.