Montevideo (, ; ) is the capital and largest city of Uruguay. As of the 2023 census, the city proper has a population of 1,287,452, making up about 36.8% of the country's total population, in an area
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 0x4fa4d7fbe80e5be62d9240dcad6b238d5af2bc65650c8c649e0c7b4369ddc601. 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/57e533ec-59f9-4c0c-8943-db35e13c0e56.json and https://artists.proofprofile.net/proofs/artist/57e533ec-59f9-4c0c-8943-db35e13c0e56.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).