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 0x4cd3d9f4a0438ed0020897055b57f672510f4375c317f7a905012234719bc2f0. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dfeb172-89ff-4247-958b-733b8985c097.json and https://artists.proofprofile.net/proofs/artist/7dfeb172-89ff-4247-958b-733b8985c097.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 0xfa3f7a94b5bd0b1dae48d1a1a9ea045b739c762d4220cdaaf1c5282056d34297. 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/QZGLS2521364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d3ebb1c637c41e15b72ab2d6517722e2a63fa502bc98f3edbc297e85fe2d23. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNJV2553113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d1f2f2c65b4e9c0ea4370d1db54c41353c0bc0dea61fe005eb3f56c31f1e0a. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:45:56Z), 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/QZNJV2553114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e7527f968fb562a928a4c6fecab942465bc2115558fe4677fc522ef7911b09. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:46:45Z), 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/QZNJV2553115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b03aa7d465ac8228610591e45b6abcd47a49ac883f3ee2fac19b8f830547677. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:20Z), 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/QZNJV2553116.