, is a word of Arabic origin, meaning liberation. Uses of Tahrir include: at-Tahrir (1959–1963) daily newspaper of the National Union of Popular Forces in Morocco Al Tahrir - an Egyptian daily Tahr
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 0x80f239dd362b441241027aba862e973b8ab66f633fd71d88a688ae56a0537c98. 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/715307e3-3bb0-4af9-830f-36c34e9142e5.json and https://artists.proofprofile.net/proofs/artist/715307e3-3bb0-4af9-830f-36c34e9142e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).