ISRC DEF058802621
Verified recording
DEF058802621 is “Piano Sonata No. 26 in E-Flat Major, Op. 81a "Les adieux": I. Das Lebewohl. Adagio – Allegro” by Ludwig van Beethoven,
registered on the CopyrightChains blockchain with CopyrightID
0x05c04fae50dad1e7b93246ec5daf253300b27caebeb68c7896d80c9c3892e30a and independently timestamped
in Bitcoin block 960407 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058802621.
Recording identifiers
- ISRC
- DEF058802621
- Title
- Piano Sonata No. 26 in E-Flat Major, Op. 81a "Les adieux": I. Das Lebewohl. Adagio – Allegro
- Artist
- Ludwig van Beethoven
- CopyrightID (CopyrightChains transaction hash)
0x05c04fae50dad1e7b93246ec5daf253300b27caebeb68c7896d80c9c3892e30a
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T13:26:30+00:00
- Bitcoin block
- 960407
- Canonical record hash
sha256:c262bb82c41a3d7343fcc1a87196bef701c2c76ec78e556a125ad79d0c7fc585- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058802621
- Bitcoin block existence check
- https://blockstream.info/api/block/960407
Full record
Track page: Piano Sonata No. 26 in E-Flat Major, Op. 81a "Les adieux": I. Das Lebewohl. Adagio – Allegro · Machine-readable JSON-LD