Algan (Chagatai: آلگن or آلگان) may refer to: Algen, Kohgiluyeh and Boyer-Ahmad (الگن - Algen) Algan, Markazi (الگان - Algān) Algan, Qom (الگان - Algān) Algan (horse), French-trained racehorse act
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 0xe2f8f1db25def02436e1394189041c95b867b77dc2a6828c103219cb84f9e4ff. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a34b5cc6-401a-4e22-8bea-f39681d030db.json and https://artists.proofprofile.net/proofs/artist/a34b5cc6-401a-4e22-8bea-f39681d030db.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).