Thi (Quốc ngữ: Thị; Hán-Nôm: ) is a Vietnamese name, usually given as a middle name to females (see: Vietnamese name). It may also refer to: City of Thi, a city in The Wizard of Oz thị, Vietnamese
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 0xea3bbdc8abff60901316cfc5e753de5b3e77568ce49c74901a3ee35cd133fd09. 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/593cb943-c8fa-46c6-9fdb-4890d7a0e0a6.json and https://artists.proofprofile.net/proofs/artist/593cb943-c8fa-46c6-9fdb-4890d7a0e0a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).