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 0x869ab6c6c1e0bf1a12800f755ecc98157a57aa994e939e2ab05647e55c12533a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/434d7b49-86c8-49bc-b3ad-2f8dabf0e6b9.json and https://artists.proofprofile.net/proofs/artist/434d7b49-86c8-49bc-b3ad-2f8dabf0e6b9.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 0x2e95c5a0f8d7e1f763f8702229cf7957ad5b2ffebddd5f3824b1d704e0c14055. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAQ8S1618655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4f8b7689bc9a6a1cf145667d4bb2972f22ccac8339f35fa247596c6a348079. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T09:59:46Z), 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/CAQ8S1618664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526424a608347098b8e6d6470d551b05703a4f13780739fa4bada8b716a5c1ff. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CAQ8S1621032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ae147ed1eca766b64cbd1278d0aec54f47abaf64dc6c52447a13ec579cf849. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/CAQ8S1621178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9df6b0d5e14805264b8c0a28ba73ed57669434e63baeec8ebcf031d40345f6. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:09Z), 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/CAQ8S1621356.