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 0xd94405613bb030b6f283c39768cf1660b56121a7e71ea66c0954ec8b3ad9b251. Chain 2 (Bitcoin): anchored in block 953973 (2026-06-16T16:37:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a3029e5-331a-4a11-bfaa-a3be1417fd38.json and https://artists.proofprofile.net/proofs/artist/2a3029e5-331a-4a11-bfaa-a3be1417fd38.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cuando Suenen los Cohotes - Repartiendo Alegría - Pronto Nos Vamos - Cuando Pasa Mi Hermandad
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 0x0caffe7f4078e51b59269b3f08f64896bb1f853709c8cb15830cd46bd0662131. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES26E2313601.
La Salve en San Ginés - No Me Digas Nada - Soñar Contigo - Entre Jarras Polvorientas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc7166851d505d6f12f515a16d568a723b3402c7c80c58ccba9a6666d9e23e0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ES26E2313602.
Sobre la Hierba del Lugar Nuevo - Desde la Sierra a Su Cielo - Santuario de Andújar - Todos los Caminos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60ccaa59968d92c71cd87b0bc749df1f96cc4f2f0719d28cb76f6fed2e9559f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES26E2313604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d2b74e1cd48e2f9144476280d7c6f12f22c8e03c02717a141b1709bb0905c7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/ES26E2313606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00068246b54dae2b8948535b1b75759f5994731fff73359238ef9247bc94eadb. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/ES26E2313607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2178c76f977be637bdadb33a1910fad54e236fa7c1d3548ca85cf0f4e5df147. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ES26E2313608.