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 0xaddc583f51cc2f30861fe47761ec8ba1d75d75c8ce851ac3cd4c86fc5ba96fde. 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/df044b6b-77e2-4dd6-958c-9dc1f5f3f53a.json and https://artists.proofprofile.net/proofs/artist/df044b6b-77e2-4dd6-958c-9dc1f5f3f53a.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 0xa6a1f35a901db7bcad721030234e47a3bb445ef83e0fc75e9cb11e776460d09a. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:38:42Z), 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/QZTB42364647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8feaa7ce4d61a6690844222585fd5e433790b4b575dcda71e1ddc02e70fe5efa. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:31:00Z), 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/QZTB42364649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038fdbdb0f76dbe821ca55095d8ca47c838aabccb0b7c4da7cb83d2af2df8346. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFYX2311216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d195fe3b2dce01f63149adf66755ede4e209714e92c26017178d10754be9da. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:20:33Z), 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/QZTB42364651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d36178518b9399fe8360ea47fe9c74479cb9364b10fce82d22670dd1244a833. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAW2475262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f38096464542753c9d024c542646200f6a371a6042346ca938f4301a735c15. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZSYP2517439.