Jappe is a surname. Notable people with the surname include: Paul Jappe (1898–1989), American football player Anselm Jappe (born 1962), German professor
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 0x3fe67a914aee82cf6aa05f357b7e698ef7a743e6e7e029ac8d4885f96cf4d0e1. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfba663b-0003-4a27-aa39-028c5fbaca54.json and https://artists.proofprofile.net/proofs/artist/dfba663b-0003-4a27-aa39-028c5fbaca54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).