ISRC CALC41601092
Verified recording
CALC41601092 is “Two Rondos for Piano, Op. 51: Rondo in G Major, No. 2” by Ludwig van Beethoven,
registered on the CopyrightChains blockchain with CopyrightID
0xc1b47ab7b9236ddf8d642fe4be2ca88e07c8f6fed86b4d0a38a9b786f628f292 and independently timestamped
in Bitcoin block 957120 on 2026-07-08.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC41601092.
Recording identifiers
- ISRC
- CALC41601092
- Title
- Two Rondos for Piano, Op. 51: Rondo in G Major, No. 2
- Artist
- Ludwig van Beethoven
- CopyrightID (CopyrightChains transaction hash)
0xc1b47ab7b9236ddf8d642fe4be2ca88e07c8f6fed86b4d0a38a9b786f628f292
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-08T03:22:41+00:00
- Bitcoin block
- 957120
- Canonical record hash
sha256:fffe19e2f813915082595a59e62bf473026cebd1460ac0ffd0609b1d598446e0- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC41601092
- Bitcoin block existence check
- https://blockstream.info/api/block/957120
Full record
Track page: Two Rondos for Piano, Op. 51: Rondo in G Major, No. 2 · Machine-readable JSON-LD