thumb|right|The emblem of the dolphin and anchor which has been used since Roman times to illustrate the adage. This example is the printer's mark of Aldus. Festina lente () or speûde bradéōs (, ) is
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 0x788bed55f1150f62f9af3b2b779863d6cfccac2210b9ca18458c243b4014d327. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c06f303-5077-4582-b849-9226ca2c6011.json and https://artists.proofprofile.net/proofs/artist/0c06f303-5077-4582-b849-9226ca2c6011.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).