Yousra (; ; , ; born Sivin Nesim (, )) is an Egyptian actress. She is regarded as a prominent figure in the Middle East entertainment industry and has been described as an influential cultural icon in
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 0x49077ca3fc501de0f46171f43618c4a35d3ed6b0ae8460f6b74b0dbeda596e42. Chain 2 (Bitcoin): anchored in block 954004 (2026-06-16T21:01:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3290fdb0-5c3e-4a59-b0f3-14b6cf0ad803.json and https://artists.proofprofile.net/proofs/artist/3290fdb0-5c3e-4a59-b0f3-14b6cf0ad803.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).