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 0xf77023e3b5eff8c5c9cd5e0c8d1571c5143c2ed9225a45bb21916979be233687. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe80b986-a2f3-4e05-bab8-de00b73b6262.json and https://artists.proofprofile.net/proofs/artist/fe80b986-a2f3-4e05-bab8-de00b73b6262.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 0x776e7938c855b3501dd08b19dc76f9a006c88d48480ef354fe0531706b6ae7da. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USA371221872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6ca2e69960950c74fb7e42a19bf450dbd477b7d4bd66d9196c4da6d2c2d605. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:26:17Z), 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/USA371221873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc927299fa1913e7338513f34862c749a5effb64d09224bb81075758efe7f61. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:20Z), 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/USA371221875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9db579674b70926c1d7aa53db4af8893c48afd5a8bbbc28428e439ccfb5f4e7. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/USA371217502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77264ac7be7e8fe93d6cae3aa0e12065a3904ad332ca0c5601e84a9843b2dc13. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:47:33Z), 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/USA371222305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606988d64182313b6c44894203543ce23eb462b03ad70b419b62611bd19b4f3d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USA371221911.