Ansu may refer to: Ansu apricot, a common name for Prunus armeniaca Ansu, Hebei, a town in Xushui District, Hebei, China Ansoo Lake, a mountain lake in the Khyber-Pakhtunkhwa province of Pakistan
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 0xd4b6fe64c699aa543d8a929b1afaa98454dbfa36f1f140f6f35aab697624bed7. 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/6a2ec55c-86e6-49e5-9609-924be75ef210.json and https://artists.proofprofile.net/proofs/artist/6a2ec55c-86e6-49e5-9609-924be75ef210.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).