thumb|Palestinian leader Yasser Arafat was referred to as the "rais" (), plural , is an Arabic title meaning 'chief' or 'leader'. It comes from the word for head, . The corresponding word for leader
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 0xa750283327a1e5e4d7cacbcc380c2e28a9be5d3a5fb070f0c05a4d196c009712. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f198127-b643-4612-883b-cee40bf817a3.json and https://artists.proofprofile.net/proofs/artist/7f198127-b643-4612-883b-cee40bf817a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).