1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xfffb9e25ff940f8192fbecd51d36af70fc0bebbfda1fb81fd568ec8f0280a4ab. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcf47b3e-ef5f-4fd1-a1f3-0b89ec3886c6.json and https://artists.proofprofile.net/proofs/artist/bcf47b3e-ef5f-4fd1-a1f3-0b89ec3886c6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).