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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266a1d7897036439863223f4df0c83d4e7c2ac4ae020a828f6693ddeff0be6e8. 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/6726a531-4dcd-4e47-acfa-566698af3cbd.json and https://artists.proofprofile.net/proofs/artist/6726a531-4dcd-4e47-acfa-566698af3cbd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Los Trovadores del Norte Cronología - Puente Pexoa (1963)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca3cdb3c6472d304f46b5f59a2ed3184dd42aac619618cf45a64a927772b853. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:42Z), 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/ARF109901026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079e1d57173786da9f8ea9006238b0ef3ab4e276475f0e7bd2534a0f7158d35f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ARF109901032.
Los Trovadores del Norte Cronología - Los Trovadores del Norte (1964)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aca6f788a3616135f817bb1aceee88b45b66d33f23dd4f78d4392203edc8ea. 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/ARF109901023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1ec3e25a83c01c29cc7dcea898e595d4e2e60eba4ca6dcf34cc7c96b3442b1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:40:35Z), 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/ARF109901022.