Huan may refer to: People Marquis Huan of Cai (died 695 BC), ruler of Cai King Huan of Zhou (died 697 BC) Huan Yi (), Qin general Emperor Huan of Han (132–168) Sun Huan (Jiming) (194–234), Easte
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 0x0682bd618e9274cf5f2fae6dfd76690d5fbba8228ec809b645969aef15f728de. Chain 2 (Bitcoin): anchored in block 953860 (2026-06-15T23:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03694ba6-5545-4832-96c1-0f959f67e2f4.json and https://artists.proofprofile.net/proofs/artist/03694ba6-5545-4832-96c1-0f959f67e2f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).