Fatma may refer to: Fatima (given name), an Arabic given name, variant of Fatima Fatma (surname), from the given name Fatma (TV series), a 2021 Turkish miniseries Fatma (film), a 1947 film starring U
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 0xa04828029f81686387143700258ac18e557808c0529cd62da326f02cf3123ff8. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23c9c3b9-0a87-4d23-b905-605bd81b74cc.json and https://artists.proofprofile.net/proofs/artist/23c9c3b9-0a87-4d23-b905-605bd81b74cc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).