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 0x8d4caa5753d43a4ce4bbb3c39ab51838b6d8a57f9757d1e92b79cce19945ef9f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17363644-ac84-43af-a96b-2964729f2f52.json and https://artists.proofprofile.net/proofs/artist/17363644-ac84-43af-a96b-2964729f2f52.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jacques Leonard. El Payo Chac (Original Motion Picture Soundtrack)
Elcano, el Barco Blanco (Original Motion Picture Soundtrack)
30 Monedas (Original Motion Picture Soundtrack)
Jujol-Gaudí, Two Geniuses of Architecture (Original Motion Picture Soundtrack)
Rawan 16/07 (Original Motion Picture Soundtrack)
Querido Fotogramas: 70 Años de Cinefilia (Banda Sonora Original)
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 0x32f404d039780b9cf45e7b9e543033cde669cc330e094c5f23ae519578f458d0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES71G2031843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc3fd406541472a83c26583f424f39c85fde0bcea385288feab7530928e974b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2127330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb896f3fcc32a6e79b2c398c221c100d5d0e5e7bb4e8e6494de936da4ca117284. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:23:20Z), 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/ES71G2127331.
Sublimación (Original Motion Picture Soundtrack)