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 0x654b4b9e17a261ceca2f3ebd5cf624ad0c4849ba34a66bf9c6487ef9e6c1bdb9. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc76ff07-db88-4864-80c8-e876bd6533b1.json and https://artists.proofprofile.net/proofs/artist/dc76ff07-db88-4864-80c8-e876bd6533b1.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 0x58c88f6cf9a3f16251698a54ceebee2820b0c6b20b6b68c985bbf24cdc1e6675. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:27:21Z), 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/TCAHP2316498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d40edd406a6fb5fc8c9453b9621922077d3b8e3a51eb77a20bd327215a5a6fe. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:09:25Z), 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/TCAHP2316556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fa67b788f81fd81644bf208027dabaea5ffc285f43481973384adebdf496b1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:03:05Z), 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/TCAHP2316585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6da6d871af0d06b81b01c9fafd28867746191e905564bed9a97f983da05745f. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/DER300756005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b722e9124ccd0dfff88cc020c4e559538d1b85dadcb7b1f74cf9fefef65c33f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DER300756002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7d1ffaf260e0bf37a6d64210fbac3421bd28398896392c5c6aa5dcca6ec192. 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/DER300529018.