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 0x6401de7aa8be116c15bd642a8c7338c8d94afb793c34b65cf1daf490154a3fb4. 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/918fdad1-c84f-464a-b8a8-7f845c00aee3.json and https://artists.proofprofile.net/proofs/artist/918fdad1-c84f-464a-b8a8-7f845c00aee3.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 0xc50bdfe295e85e383d4d0ce09abc1c7ef299405d4e3a7fbf668015338df8e969. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:18:10Z), 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/GBHFP0408442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a94fb5f1bff4252bd7a1e37b9e36f898c4a874269972876eefcc2cad6aa8f8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:01:06Z), 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/GBHFP0408450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee860db98c2e6637f6e3f79092d048d61759e79d674143dc3025116540dce7e6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:27:20Z), 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/GBHFP0408444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036eb222d329012e921746e8f8447e3fa61c3d6fd8a8ef31c227ad8d3c05ccbf. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/GBHFP0408451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6ad9c0ef92cd8f52c0f89ff87a49f6ae7ed1e4d36a74b5bdb4260150c7c67a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:56:06Z), 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/GBHFP0408440.