Tbilisi ( ; , or , ) is the capital and largest city of Georgia, located on the banks of the Kura River. With more than 1.3 million inhabitants, it contains almost one third of the country's populati
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 0x57e93161667e011940cadeb9b141223d2c36c1af864e1f789958d2ea9549eaaa. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d23e9313-b7c5-4da4-b4b4-00e5764ed7cc.json and https://artists.proofprofile.net/proofs/artist/d23e9313-b7c5-4da4-b4b4-00e5764ed7cc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).