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 0x8e661430e0f57f8779af87c0673c43ed2f63c302bb467e3258f860da7a982818. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8b2e10c-0b5e-41f1-b9bc-69e51f6586fa.json and https://artists.proofprofile.net/proofs/artist/c8b2e10c-0b5e-41f1-b9bc-69e51f6586fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x86621f8e457c9930e4e2a280b585c9653f896c46fc0fda93db64952b2433ff59. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXF010001749.
Zorzales de Antaño - Dr. Alfonso Ortiz Tirado - Vereda Tropical
Zorzales de Antaño - Dr. Alfonso Ortiz Tirado - Mañanita Fria
Zorzales de Antaño - Dr. Alfonso Ortiz Tirado - La Feria De Las Flores
Zorzales de Antaño - Dr. Alfonso Ortiz Tirado - Gotas De Amor
Zorzales de Antaño - Dr. Alfonso Ortiz Tirado - Ojos Tapatios
Zorzales de Antaño - Dr. Alfonso Ortiz Tirado - Serenata
Zorzales de Antaño - Dr. Alfonso Ortiz Tirado - El Pañuelito
Zorzales de Antaño - Dr. Alfonso Ortiz Tirado - Cabellera Rubia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86621f8e457c9930e4e2a280b585c9653f896c46fc0fda93db64952b2433ff59. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXF010001749.