Fathy Salama (Arabic فتحي سلامة; born 13 February 1951, in Cairo) is a Grammy Award-winning Egyptian musician, who usually appears with his ensemble Sharkiat (شرقيات, "Easterners"). Salama grew up li
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 0xc74bb0eaee557c952fb620cdedbd9524bf3dd05f27710be2a95cff3d801c51c6. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efb4a04f-5223-4a2b-a3bb-3686f97c477f.json and https://artists.proofprofile.net/proofs/artist/efb4a04f-5223-4a2b-a3bb-3686f97c477f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.