1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4840129fb3e50db7f27d803d33da0c299fc36e739ea69bcf9ba226ce619929. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f841e57-3d10-4bbc-a509-0e7cdf13e6fb.json and https://artists.proofprofile.net/proofs/artist/5f841e57-3d10-4bbc-a509-0e7cdf13e6fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Medley Combo Uno: Romance Ilegal/ Haciendo el Amor/ Cero 39
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8811a2d9bedf821e63e4fbfb8abf8e6d124015615ef9211e2d14547278ea868f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR2X41804274.
Medley Combo Tres: Caprichito - Suéltame - Quiero ser más que tú amigo - Cómo estás tú? - Pero qué necesidad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548d44635186016886af8ff5730152b86e0d57d03d86390897acd0cfa76344ff. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR2X41804276.
Medley Combo Cuatro: La Tarde Que Te Amé / Así Fue / El Río / Compadéceme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ddf4502fe7e98a2ae1646f5f4e578e79789a89ba68387a5128067329394d77. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/FR2X41804277.
Combo Cinco: Ojalá/ Pedacito de Mi Vida/ El Galeón Español/ Más que tú Amigo/ La Piragua/ Agüita/ Gotitas/ Vagabundo Soy/ Este Pasito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7190ad3c4e8a0ae232c6e76cc6289dd210628b2038455572dd84bffc64ba8889. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ART0G1807357.
Combo Seis: Si Te Pudiera Mentir / Amiga / Amor De Adolescentes / Fuiste / Tonta / Sidi Mansour (Allah Allah Ya Baba) / Los Ejes De Mi Carreta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07603e75fa12f1c660b588d5047b9d105e693430c0fd88b3dadeefb8522cd0f7. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/ARIXB2100161.