Nesma may refer to: Nesma Airlines, Egyptian airline and subsidiary People Angelli Nesma Medina (fl. 1978–present), Mexican producer Nesma Idris (born 1970), Egyptian short story writer Nesma M
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 0xa88c4612e0b1d3057754d904ddef574927ba9b7a4e6b6f32c692bb9564175c13. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e738257-9a7d-4444-bdcf-5e90326022c4.json and https://artists.proofprofile.net/proofs/artist/6e738257-9a7d-4444-bdcf-5e90326022c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).