right|thumb|Acqua alta floods in Piazza San Marco, November, 2004. The increasing frequency of this type of event caused considerable damage and prompted projects such as MOSE. MOSE () is a project i
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 0xb9de0d3e1bba6f5922aded84dd71a4f3e5abfb6fb4bad4138d7d6edd5c2d891a. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec598b70-0209-4dcf-ae06-0773116ef9f6.json and https://artists.proofprofile.net/proofs/artist/ec598b70-0209-4dcf-ae06-0773116ef9f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).