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 0x3e23ed48e85bc3f78caf1068813cf60e4106a08b2bf0dadf3463480057235e9d. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b21c430-bb51-40e7-89d9-7a260f546d7d.json and https://artists.proofprofile.net/proofs/artist/1b21c430-bb51-40e7-89d9-7a260f546d7d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Bella Durmiente, La Cenicienta, Los Músicos de Bremen, La Liebre y el Erizo, La Muerte Madrina, La Reina de las Abejas, Las Tres Hilanderas
Caperucita Roja, Blancanieves, Hansel y Gretel, El Rey de las Ranas, El Enano Saltarín, El Zapatero y los Duendes, El Pájaro de Oro
El Rey de las Ranas - Cuentos de los Hermanos Grimm
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 0xe1f90c1b542a15a38208f754788766292df297fdb6f959553a863dd568b3eda9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:32:27Z), 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/ES5770604867.