{"product_id":"selfknot","title":"SelfKnot","description":"\u003ch2\u003eThe open rung. The openness is the product.\u003c\/h2\u003e\n\u003cp\u003eA seeed Xiao board plus a secure element holding a key generated on-chip that cannot be extracted in software. \u003cstrong\u003eThe firmware is open and user-replaceable by design\u003c\/strong\u003e — and that is the honest claim: trust comes from the ledger-enrolled key, not from firmware you could replace yourself.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eXiao (seeed) + ATECC608B secure element\u003c\/li\u003e\n\u003cli\u003eP-256 keypair generated on-chip, non-extractable\u003c\/li\u003e\n\u003cli\u003eFirmware open and user-replaceable\u003c\/li\u003e\n\u003cli\u003eNo confirm button — it makes no human-presence claim\u003c\/li\u003e\n\u003cli\u003ePotted in clear resin; serialized\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAvailability\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eShipping now\u003c\/strong\u003e, in small runs — the secure element is the supply constraint, so quantities are limited per batch. Defeats casual forgery; does not claim a person was present.\u003c\/p\u003e\n\u003ch2\u003eTry one before you buy one\u003c\/h2\u003e\n\u003cp\u003eEvery attestation device signs a challenge and the record is checked in your browser at \u003ca href=\"https:\/\/verifyknot.io\/start\" rel=\"noopener noreferrer\" target=\"_blank\"\u003everifyknot.io\/start\u003c\/a\u003e — no account, no login. The verdict is computed from the record itself, not handed down by our server.\u003c\/p\u003e\n\u003ch2\u003eWhat it does not do\u003c\/h2\u003e\n\u003cp\u003eA signature proves that a specific key signed specific bytes. On its own it does not prove who held the key, that a person was present, or that the contents are true. Each rung of the line adds one of those, and we say which. The timestamp on a record is ours, not an outside authority’s. Tamper-evident, not tamper-proof.\u003c\/p\u003e\n\u003cp\u003eHand-built in small runs in Utah · veteran-owned (SDVOSB) · US shipping with tracking · \u003ca href=\"https:\/\/zknot.io\/returns\" rel=\"noopener noreferrer\" target=\"_blank\"\u003ereturns\u003c\/a\u003e\u003c\/p\u003e","brand":"ZKNOT","offers":[{"title":"Default Title","offer_id":53923530211439,"sku":"SK-1","price":59.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0720\/0492\/7599\/files\/powerverify-9207816.jpg?v=1789879986","url":"https:\/\/shop.zknot.io\/products\/selfknot","provider":"ZKNOT","version":"1.0","type":"link"}