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 0x6d8f55a15067e2f407f45a2b0c5a5d18271c843853e73b173bca81b82b112494. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/372d0f48-8bbe-4c44-887a-a8a19ac316c4.json and https://artists.proofprofile.net/proofs/artist/372d0f48-8bbe-4c44-887a-a8a19ac316c4.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 0x7d6fec5f90490cd0098dd600c3b501b0f33de8d38dceed42dc9c93582e02c58e. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:22:20Z), 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/NOAPC0915051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d37faca3aaadb7205af5704a9a39722cfb5aa0197d6785db6f769852324c2da. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/NOAPC0915055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf0e1c24b6b8986ebcfa72c324e092629de7d45f36cec4c167bacc58a0ba96b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NOAPC0915052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72df8de32c31176a410824a8a77981faefaf68a55fb94a4ad2bc2c74375f60d1. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NOAPC1115001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbced9804934c013552fad53ec91d41b74b7f9949aed39df8e27b3214f411f055. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NOAPC1715027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dec6e5c69a5673ece41c17b4b56e4d1f8664ddf5497ccd1451fb5018023a325. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:15:33Z), 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/NPA0D1700620.