thumb|Lavinia from Promptuarii Iconum Insigniorum thumb|250px|Lavinia at the Altar () by Mirabello Cavalori, depicting the moment at which Lavinia's hair blazes as an omen of war but ultimate reconcil
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 0x9f6ef16bd9395d24998cda9c1d95576c28ea5d90598c6f031dff59a1d06993ef. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e6ef5a2-8cc7-4df1-9560-cbbded5374e4.json and https://artists.proofprofile.net/proofs/artist/7e6ef5a2-8cc7-4df1-9560-cbbded5374e4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).