Yan Yan may refer to: Yan Yan (disciple of Confucius) (言偃) Yan Yan (Three Kingdoms) (嚴顏) Yan Yan (snack) Hung Yan-yan Rani Yan Yan Yan Yan Chan Yan Yan Mak See also Yanyan, or HD 38283 b, an
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 0x1e65ef59ee31f843e846e5b05107983e35ff4d990c819e9555e9353e95377d33. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0918d64-d955-491c-90a0-6e104b089f2c.json and https://artists.proofprofile.net/proofs/artist/e0918d64-d955-491c-90a0-6e104b089f2c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).