ISRC CALC42021121
Verified recording
CALC42021121 is “24 Préludes, Op. 28, No. 21 in B-Flat Major - Cantabile” by Frédéric Chopin,
registered on the CopyrightChains blockchain with CopyrightID
0x6459f3d6dbafaff2c84f0536cfdbd0f7e1ef772a06411938ba94221e238699ac 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/CALC42021121.
Recording identifiers
- ISRC
- CALC42021121
- Title
- 24 Préludes, Op. 28, No. 21 in B-Flat Major - Cantabile
- Artist
- Frédéric Chopin
- CopyrightID (CopyrightChains transaction hash)
0x6459f3d6dbafaff2c84f0536cfdbd0f7e1ef772a06411938ba94221e238699ac
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-08T03:20:19+00:00
- Bitcoin block
- 957118
- Canonical record hash
sha256:607bc1b65ada209898ab681ff6a901411fca5326ad8c9536d6ac92e9a41f5687- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42021121
- Bitcoin block existence check
- https://blockstream.info/api/block/957118
Full record
Track page: 24 Préludes, Op. 28, No. 21 in B-Flat Major - Cantabile · Machine-readable JSON-LD