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 0x6a8ce4ec90232e1725ad088ec418ba69f56f509fdba2af440110e596f8382934. 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/8b2e4d68-3b87-44bb-9f87-3b2a4e4d3500.json and https://artists.proofprofile.net/proofs/artist/8b2e4d68-3b87-44bb-9f87-3b2a4e4d3500.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 0xcb69303a0b462674039a7622792c3300481586b316a77266c51f2305cdb73425. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBSMU8113431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9e4d80477f969a02045b2e4a6f22c7c759951b8be80f772dc4a3eb5cee30cc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBSMU1677393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3c0ba37123e8dbcba3ca4da0911842204faa038a4d9c2aff2f1b5a8de076bb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBSMU2078635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4719f47cd5cca10a92b269064a8a9591f3d6b65c2df7ef42f66f4747ef0b588c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:56:06Z), 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/GBSMU8876983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25936029303c1df4450cb0be96808f38feb59a81bbcd71846862c93d896b67d9. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZES72175365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286f74ba12ce05ba644eecf757ab31c48a5cf68de1b13c90638c4e155d982e9d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTB72310206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594ddc18a8d4c365dedfafbad045100ab31d5ea11050b3741878558ea35ed036. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:43:07Z), 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/QZTB72310207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3951a23b98e2ee063e39ab04ea3ef57d2cc1bb793f8f5aed7c4536fc651d4086. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:58Z), 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/QZTB72310208.