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 0x66bed0a3ef8bd0fcc2123bc50b610e568893212525873ca4b3e7340da3371f51. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce280e90-35bf-4261-b29c-d4b27e0c04f7.json and https://artists.proofprofile.net/proofs/artist/ce280e90-35bf-4261-b29c-d4b27e0c04f7.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 0x372806ee7b1b3511c619366d04ab2539c3352cbc726bc07ec0af37a0029de368. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:17Z), 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/SE57V2412096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197352f98d6d6e3312b56c64b4a551b26af609feda061254de455130464d448f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:45:59Z), 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/SE57V2412104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59322efd5a145f6b98a4095eb997c8d96f55f868f2321c793961aaf331b85d1. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/SE57V2412350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce2cb228e8717a2eadbed8d1ef82d6ee58f34109c10931f97e46bbeecbfebad. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:04:06Z), 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/SE57V2412348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5332a2ad6e5b43f9490f0faec5211e3de6acd54e48e6d435cecce11a0dd54a26. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE57V2412881.