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 0x3daf0a8573137751b6067ae364e341d77cc4d45c3ebfc4a473588d88f9f9f870. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e687a006-7ba5-4cb1-bf33-c1ebcae043fe.json and https://artists.proofprofile.net/proofs/artist/e687a006-7ba5-4cb1-bf33-c1ebcae043fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Feria de Abril - Las 40 Mejores Sevillanas
Medley: Cinta Negra / Mi Madre Me Dijo a Mi / Que Si Te Quiero / Cogiendo la Aceituna
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 0xf9ed93bf1918304d01b108755e6b92df906f008e5e32cc8109f21a2dee1a62f5. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:37:01Z), 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/ES5161904828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dad7ef0664656962f423b4a79f191d0e55385d03c8a1fe5a128516e28da9b8e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES5161302008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65eaaab923ba2292cf8ccff40705c3ef4932f4a8ee840f89bcbc2c696063fee1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5160600413.