Piano Sonata No. 26 in E-Flat Major, Op. 81a "Les adieux": I. Das Lebewohl. Adagio – Allegro

Recording identifiers

ISRC

DEF058802621

Release date of the album this recording appears on

2011-01-01

CopyrightID (CopyrightChains transaction hash)

0x05c04fae50dad1e7b93246ec5daf253300b27caebeb68c7896d80c9c3892e30a

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-08-01T04:30:37Z

Bitcoin block

960509

Canonical record hash

sha256:831db5afd89ead80350c9afbdfb6a6ee7fafc53f71d90f278c16d3bedad642f0

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DEF058802621

What this proof establishes

This recording was released in 2011, 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.