Kelex is a fictional robot appearing in American comic books published by DC Comics, commonly in association with the superhero Superman. Publication history Kelex first appeared in The Man of Steel
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 0x8defc9c03fc36b1f69101aad3081777b6bbebf735eaa4cddd78cc3f407f2476d. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bdbf9a3f-b8f0-4ea6-bda4-fa91aecde1b4.json and https://artists.proofprofile.net/proofs/artist/bdbf9a3f-b8f0-4ea6-bda4-fa91aecde1b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).