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 0x30bb0e940d27d133e68eb32569e40e07f48df2b00847b061a7aa1d334e83a2d0. 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/cf6dac3e-5d5e-43b5-a90d-ea8c2a73d900.json and https://artists.proofprofile.net/proofs/artist/cf6dac3e-5d5e-43b5-a90d-ea8c2a73d900.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).