Kattel () is a surname belonging to the people of either Upadhya Brahmins Bahun caste from Nepal. The Brahmins write Kattel. Notable people with the surname Kattel include: Rishi Kattel, Nepali poli
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b109ef694c92e1995d5a4a95d2092efd3e7e1f91788526fe5a92995a6693768. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b715820f-ccf6-4be1-b1e9-b7d419284305.json and https://artists.proofprofile.net/proofs/artist/b715820f-ccf6-4be1-b1e9-b7d419284305.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).