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 0xbe9f92dcd080254b778d1b2376ddf09680a9bb8a9bc222973102ccccf4b6398d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bc355e2-4d68-4b7c-8433-19cf2b45dd4d.json and https://artists.proofprofile.net/proofs/artist/9bc355e2-4d68-4b7c-8433-19cf2b45dd4d.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 0x38f195b227576622a24a22a365279b7d4816fbdb7624023a62076dd4b26ef593. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USHM90674863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c7bc7f543f91cee55561a96a22b80c00f09fb0746b3af2e9159e06b93af80b. 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/USHM90674864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41054fe4db706366f423767b54c2fd137c89261486e9bc47bb84100a5db6904f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:08:56Z), 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/USHM90674880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925b2abfe3463a48f8e001b0bf701045a355aaf513a922df7e96c03a4a672c88. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:18:59Z), 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/USHM90674885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6de7b1398c8fee7d97ce5cc30b7c5a7c4623b986cd58116496516c328ad528. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:02:43Z), 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/USHM90675321.