Kano may refer to: Places Kano State, a state in Northern Nigeria Kano (city), a city in Nigeria, and the capital of Kano State Kingdom of Kano, a Hausa kingdom between the 10th and 19th centuries Ka
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 0x3b684e5196ebbd910266f37f6a5178d63568a464899db40faf188a6bcd69dafb. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af900e2e-a00f-4757-aa69-e9f619cb6e4a.json and https://artists.proofprofile.net/proofs/artist/af900e2e-a00f-4757-aa69-e9f619cb6e4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).