Canda is a comune (municipality) in the Province of Rovigo in the Italian region Veneto, located about 80 km southwest of Venice and about west of Rovigo. As of 31 December 2004, it had a population
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c317b6aa88b0bcb52a53397e0d564d88a0834d3f7a89619281f942114cd9a1. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74953563-69c7-4bfb-aa41-d4df64142140.json and https://artists.proofprofile.net/proofs/artist/74953563-69c7-4bfb-aa41-d4df64142140.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).