Semir may refer to: Semir (given name), an alternate form of the Arabic given name Samir Vladimir de Semir (born 1948), a Spanish journalist Semir (company), a Chinese clothing company
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 0x7134b687e4b1a77cfe379a840a255a425d01ee079bd7f36b1ab46b09d8d27c7e. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b89e4d1-6ffd-4506-b37a-35e661020659.json and https://artists.proofprofile.net/proofs/artist/1b89e4d1-6ffd-4506-b37a-35e661020659.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).