Haidara may refer to: Haidara (bug), an insect genus in the tribe Coreini It is also a surname. Notable people with the surname include: Amadou Haidara (born 1998), a Malian footballer Aminata Hai
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 0x4873a14bd72b55f2bfe9c685be32067e23af6bc7250338ab75413fe8b7c5bd9f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cd0b1ff-7df0-4712-8a6a-e72621de2621.json and https://artists.proofprofile.net/proofs/artist/7cd0b1ff-7df0-4712-8a6a-e72621de2621.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).