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 0x504bffe0d70e739b63fe5dfddfc83188b670b8262de7cbe53997e3884111ff35. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e38454c-053d-4d59-b276-087831f05d5a.json and https://artists.proofprofile.net/proofs/artist/9e38454c-053d-4d59-b276-087831f05d5a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x8ee83d21709783339b2f4126d3a5f9630840bb8d08148b1860495169b650416b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:40Z), 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/ES5770600088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1e4a7c77052e47ca4706a97562f62158ff6fcf578cdfaf285aecb86031c461. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:07:55Z), 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/ES5770690224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5389a65ff9d8db624aa2f63bc9b83a85ab23e4c98caf205c4c7dbc47615ed249. 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/ES5770690230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de9a061310dca10c8a884c55d8443e7bb34418117e06dc144eef6c3d19fe282. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:30:47Z), 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/ES5770690236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5b47f330a5626b5c4301c343452b5d81bac51fdbf2778a187c22bc6f8eacd6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ES5770690238.