ISRC CALC41800407
Verified recording
CALC41800407 is “Nocturne No. 20 in C-Sharp Minor, Op. posth.” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0x47e7efa108f72b6f88ed68e05d5f90db0c37748c3c1e41c03fdeba1c582bf3b5 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/CALC41800407.
Recording identifiers
- ISRC
- CALC41800407
- Title
- Nocturne No. 20 in C-Sharp Minor, Op. posth.
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0x47e7efa108f72b6f88ed68e05d5f90db0c37748c3c1e41c03fdeba1c582bf3b5
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-29T19:35:34+00:00
- Bitcoin block
- 960138
- Canonical record hash
sha256:848e7bde8fabb6ea72bce31bf1f2cb8ca4e7bf676470f6b75fc0103e0bd76859- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC41800407
- Bitcoin block existence check
- https://blockstream.info/api/block/960138
Full record
Track page: Nocturne No. 20 in C-Sharp Minor, Op. posth. · Machine-readable JSON-LD