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 0xd0cf8fd6062d006ed3b84012fdf7ba140792603c780a4b1c651edc48daee141d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f39c1c2-766d-4917-93a1-ea0bb8856908.json and https://artists.proofprofile.net/proofs/artist/0f39c1c2-766d-4917-93a1-ea0bb8856908.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 0x6962a9e6131a4ec4ce5cb4cc16dd0edb6b4b2140726f4bacb436af2119bde017. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMFME1365690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122610fcdc939acc499f6fa28ff13e648f9ec1c7cf85a3ba1403aa8ab4ccf380. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMFME1365693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb745dae8a1e415d5b94ce66d43f1a00af4763f74a1f206e2131942b3e1364b96. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCACM1640723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab34bb74774982d7ff46ceade37990e6248de23d13b0c25ee9f4d04b002be6bf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCACM1640724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139d7c2fff0646f95da520a98d8202edcf8136a26a92f059d4d9ef4fbe0782e0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCACM1640727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fc6aed34c420f9be7a384348654ec701527b305af9feac95bf18b04179ba54. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UKXN21974589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371d699b0417fe65193b5b39aad9f2028c9d0bd6ce379494796dc23a499bf60d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBLFP2187672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe631a955654bf9aaa0c5ac5bb75e6a0ab84432324e548727c60b0b20744a9f9e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBLFP2141779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef068317aa5158cd348fcbcf71bb77642cd79056c95c5e6f45c68c8b3178a8b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:29:23Z), 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/GBLFP2187682.