1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0239f39d9c2439616719a9ad91cd28103edc251656988a225b72d533f9134e. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/693b521e-dded-4d5b-b2da-326af93d0231.json and https://artists.proofprofile.net/proofs/artist/693b521e-dded-4d5b-b2da-326af93d0231.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Todos los bienes del mundo - Juan del Encina and Music Traits in Spanish Renaissance
Encina: Una sañosa porfía (No. 327 from Cancionero de Palacio)
L'homme armé. Musique de guerre et de paix, 1450-1650
No tienen vado mis males (Cancionero de Uppsala)
Si habra en este baldres: Juan del Encina
Del Encina: Triste España sin ventura (No. 317 from Cancionero de Palacio)
The Da Vinci Collection: Music of the Renaissance
Vocal Ensemble - Encina, J. / Guerrero, F. / Encina, J. / Vasquez, J. / Romero, M. (Canciones, Romances, Sonetos) (La Colombina)