thumb|Hands with stigmata, depicted on a Franciscan church in Lienz, Austria thumb|St Catherine fainting from the stigmata by Il Sodoma, Church of Saint Pantaleon, Alsace, France Stigmata (, plural o
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 0x8184feaa3fb5505438ffb81384a81b6d72f9f8856034e686117d00756b2e8ecc. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1edf9a64-ab23-4296-adf6-68986506ab0e.json and https://artists.proofprofile.net/proofs/artist/1edf9a64-ab23-4296-adf6-68986506ab0e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).