Yudai may refer to: Yudai Township, a township in Wanyuan, Sichuan, China Jade Belt Bridge, also known as Yudai Bridge, a bridge in Summer Palace, Beijing, China Yūdai, a masculine Japanese given nam
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 0x3c9191f3b3097a452dacb21f05c85282fe1629c1360cb6bd389ccc74edcb397d. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/befb2c79-4224-4fbf-a9c1-f2e5ed2f7e5b.json and https://artists.proofprofile.net/proofs/artist/befb2c79-4224-4fbf-a9c1-f2e5ed2f7e5b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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