Nidal (in Arabic نضال meaning warrior in Arabic) is a unisex given name and surname of Arabic origin. Notable people with the name include: Given name Nidal Al Achkar (born 1941), Lebanese actress Ni
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 0x828504ba08664e80d434faeb386532d8ca55e76fa7c5403d295b9a675724cc6f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8291f2b-ac81-4337-8381-b1c532845fea.json and https://artists.proofprofile.net/proofs/artist/c8291f2b-ac81-4337-8381-b1c532845fea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).