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 0xdc21441e7984a46de16b9122ab37c2ce167097d39ff62c7a6497d08a8016ab09. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c2a2005-bf6c-4076-acd8-d4fd9720a905.json and https://artists.proofprofile.net/proofs/artist/3c2a2005-bf6c-4076-acd8-d4fd9720a905.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ballet Folklorico de la Universidad de Guadalajara
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 0x0a37beddb1f546de2bbf05a0dab27c7f9644aa44cbd39a3802cfe0a8f7cfc9fb. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USCSG1096653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e46b94eb4d545dba291cdbce972657c090e499bb1c83a77bbdec967d278a7b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MX2620481909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9de2f34ebb0827999814415a9aa6db21107d23e8d8eab9cb01108d4d62ac0ff. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/MX2620481908.
Dancing Music With Mariachi (Mexican Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6111efb293488eb8ec0b1bac6600eeeb82d11f6b88c04fd1bc3316c02919bf6f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QM6DC1874337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a14dcb94a5cc4f409840c3f9d822857a2cf2aaba275d84f49c213756e009bb8. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:33:22Z), 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/QM6DC1874338.
Popurri - Juan Gabriel Cuando Quieras Déjame / La Madrileña / Con Todo Y Mi Tristeza / Debo Hacerlo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558d2c08e375e96cb29d315b6aa7bbd7b8022a17f6b7488cfe2012e8257cdf9f. 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/FRX762208591.