ISRC DEF056400272
Verified recording
DEF056400272 is “Piano Sonata No. 21 in C Major, Op. 53 "Waldstein": II. Introduzione. Adagio molto” by Ludwig van Beethoven,
registered on the CopyrightChains blockchain with CopyrightID
0x8a790a440ac1c7778c2c0721eeec0ad369c18e6a6d6eb9c5ec681a471cb46d09 and independently timestamped
in Bitcoin block 960138 on 2026-07-29.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056400272.
Recording identifiers
- ISRC
- DEF056400272
- Title
- Piano Sonata No. 21 in C Major, Op. 53 "Waldstein": II. Introduzione. Adagio molto
- Artist
- Ludwig van Beethoven
- CopyrightID (CopyrightChains transaction hash)
0x8a790a440ac1c7778c2c0721eeec0ad369c18e6a6d6eb9c5ec681a471cb46d09
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-29T19:35:34+00:00
- Bitcoin block
- 960138
- Canonical record hash
sha256:6b6354d23286683999c4357a2d5b297d3b91d28a75b40ddf316442b219e1eb8f- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056400272
- Bitcoin block existence check
- https://blockstream.info/api/block/960138
Full record
Track page: Piano Sonata No. 21 in C Major, Op. 53 "Waldstein": II. Introduzione. Adagio molto · Machine-readable JSON-LD