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 0x0accae993f122f6f450454b09bc96be7d9a742e207f95c0b3e2c0d194c133d2d. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3abed2c6-66cc-4bfa-84b3-ae7ea1ba70bd.json and https://artists.proofprofile.net/proofs/artist/3abed2c6-66cc-4bfa-84b3-ae7ea1ba70bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).