thumb|The court of the Durrani Emirate of Afghanistan (James Rattray, 1839) Emir (; (), also transliterated as amir, is a word of Arabic origin that can refer to a male monarch, aristocrat, holder
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 0xd2835735c490956d06766e94a85dcb985503944f367b8d6e4101b95220695432. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c548ee8f-83ac-4bf1-94eb-25b468a72630.json and https://artists.proofprofile.net/proofs/artist/c548ee8f-83ac-4bf1-94eb-25b468a72630.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).