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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 0xace174ac0291977151c8957af311745b1c9bd7b7d99903738d8ef5bede5b15f5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d94f6632-2198-4ce5-9b9c-48fc934ec241.json and https://artists.proofprofile.net/proofs/artist/d94f6632-2198-4ce5-9b9c-48fc934ec241.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 0x6ee1ae5c2ebff2210cf68bfdb9c2fddfb47347c46f9f7889e137403246c954f5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:33:51Z), 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/NOCVC2236010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21449a2ad75da6d831277d2e8a97e27bd3dd34ec4fa95cf79a610d7dfa353059. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:55:55Z), 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/NOCVC2236030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2338e28813aa66bf3af42c7c6b56f2488b12addd1729dcd5f4b0b65711a9b1b2. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:08:29Z), 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/NOCVC2368020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f99f197dd894f9c0ee013dac8d8a67479139756c8f5831b9dfcc5cd1beb7f54. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NOCVC2468010.