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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5eb7e638b62cf8c3b5bfb1845f9cb99e0d0239774ce4bf4c9b446dc1437c7f2. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52292dc7-ca75-4335-b693-ec570c6964b6.json and https://artists.proofprofile.net/proofs/artist/52292dc7-ca75-4335-b693-ec570c6964b6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vasquez: Gentil señora mia, 16th Century Songs and Villancicos
Villancico. 'No Pensé Qu'entre Pastores'
Villancico. 'Quien Amores Tiene Cómo Duerme?'
Cancione. 'A, Hermosa, Abrime, Cara de Rosa!'
Villancico. 'Torna, Mingo, a Namorarte!'
Soneto-madrigal. 'Bendito Sea el Día, Punto y Ora'
Soneto-madrigal. 'Amor, Virtud y Nobles Pensamientos'
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18495d8617d9fa658377d8d6e01d3d6d10d2485eafb4322c5a42e4c3be8b6387. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ149749080.
De los Álamos Vengo - Arr. José de Azpiazu
Portrait Pilar Lorengar (Live and Studio Recordings from 1959-1962)
Vocal Ensemble - Encina, J. / Guerrero, F. / Encina, J. / Vasquez, J. / Romero, M. (Canciones, Romances, Sonetos) (La Colombina)