Chuy () is a city in the extreme east of Uruguay, in the Rocha Department, northeast of Montevideo. It lies on the border with Brazil, separated from its Brazilian sister town of Chuí only by a share
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 0xbf48e6d49cdc5655e358f86b36bd0ebfa6dab9e54a8278c95dea1b8ff6403863. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d43f56c0-0817-4a23-8b10-935435b8b860.json and https://artists.proofprofile.net/proofs/artist/d43f56c0-0817-4a23-8b10-935435b8b860.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).