Saif, Seif, Sayf or Seife (, ) is a word in the Semitic languages meaning 'sword', and as a name, 'fighter' or 'protector [of something]'. Cognates are (Sayfo), (sáyip̄), (saypā), and likely Ancien
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdad81e6dd522ed22cf300ff93c1ec7be0606c70b75b64f1873114d177c8a9b. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8627f36b-b428-4b79-b640-995555509941.json and https://artists.proofprofile.net/proofs/artist/8627f36b-b428-4b79-b640-995555509941.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).