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 0x9fef6a6ec935f2b7d2e809e58c6a6e07086c2b275859c5d106c622c856c42517. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3716630a-87d0-4ec3-a404-cdda5db7ebf0.json and https://artists.proofprofile.net/proofs/artist/3716630a-87d0-4ec3-a404-cdda5db7ebf0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sinfonía 9 en Mi Menor Op. 95 ¨Del Nuevo Mundo¨
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 0x8c5d120b192c1e26b51d29cdc5d79f2b4f34b2fe786c3e91a5f2693db6652589. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:37:10Z), 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/ES8620810401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bef768edba88dfb84c1dfa20587748e142192c70b1c2d30d2a1e25ee8aa906c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:52Z), 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/ES8620810402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bdda95d70a654b0363a255f609abb2aa0b9ec97ff4893ace6b3951644ce9b6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:21:43Z), 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/ES8620810404.