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 0x87e5b8e3559ba03e7ff8c7ce89a590b553bf5ecc5f2307d8f40363be05601a40. 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/ba5a4b4d-fd2b-4160-9bbf-5b3e2d343a90.json and https://artists.proofprofile.net/proofs/artist/ba5a4b4d-fd2b-4160-9bbf-5b3e2d343a90.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).