ISRC CALC42021221
Verified recording
CALC42021221 is “Violin Sonata No. 4 in A Minor, Op. 23: I. Presto” by Ludwig van Beethoven,
registered on the CopyrightChains blockchain with CopyrightID
0x16c506b202053feb6935d26872255bdf60c41ea154df2cf53f47b6b041c8cdf0 and independently timestamped
in Bitcoin block 957118 on 2026-07-08.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42021221.
Recording identifiers
- ISRC
- CALC42021221
- Title
- Violin Sonata No. 4 in A Minor, Op. 23: I. Presto
- Artist
- Ludwig van Beethoven
- CopyrightID (CopyrightChains transaction hash)
0x16c506b202053feb6935d26872255bdf60c41ea154df2cf53f47b6b041c8cdf0
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-08T03:20:19+00:00
- Bitcoin block
- 957118
- Canonical record hash
sha256:44d594a7c570b454af3f2177c742953fd58409d41acafaf33b2f1aba1eebccdc- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42021221
- Bitcoin block existence check
- https://blockstream.info/api/block/957118
Full record
Track page: Violin Sonata No. 4 in A Minor, Op. 23: I. Presto · Machine-readable JSON-LD