Kun or KUN may refer to: Kun (surname), Kún Khun etc People with the given name or nickname Cai Xukun (b. 1998), Chinese singer known simply as Kun Cao Kun (1862–1938), President of the Republic
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 0xbaa481edcb773aa0dd5330e2fb63b765fb852a53870a51cd9f11eb3b5dcea1e1. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ae55d2c-d60e-4428-bcd2-cef99af629f0.json and https://artists.proofprofile.net/proofs/artist/1ae55d2c-d60e-4428-bcd2-cef99af629f0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).