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 0x8f6c860fa09cbddb9d0a181b3446c63992efcd624263d1fb0cf5ccb50721cd37. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc44f461-a373-427a-8a53-2d73e5d41f0f.json and https://artists.proofprofile.net/proofs/artist/dc44f461-a373-427a-8a53-2d73e5d41f0f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Francisco Tárrega, Isaac Albéniz y Enrique Granados: Rincones de España
Francesc Tárrega, Isaac Albéniz y Enrique Granados: Rincones de España
Fantasia Sobre "El Paño" O Sea "El Punto De La Habana"
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 0x37a51f225f91872f0e47406b3888876575c06bcd7e9573c70a295c47e4ae35f4. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/ES8200110301.
Música favorita en dúo de guitarras, Vol. I
Música favorita en dúo de guitarras Vol. 2
Música favorita en dúo de guitarras vol. III
Música favorita en dúo de guitarras, Vol. IV
Música favorita en dúo de guitarras vol. V
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc686fdb8bea1bd3939b24a653470a0b4ba55494250ee0f42c90e2561d920713. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/ES5300822141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6e8383de23ea60ace34ffe8b25a0e0bacacbac07bba917d802658e1e5accc7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES5300822143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8429dad5aadbbb89b75018483e24b4b66841fd00d8541953b68182a14d9d7896. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ES5300822149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9a3c258dc2320525285689f4ad8333658e173963c41e5b840dab7bb1aa2552. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:44Z), 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/ES5300822136.