Public Proof — Verify a Parcel Token

No account needed. This page recomputes the patent's unique output token from raw coordinates entirely in your browser. See documents/PatentBackbone.md §3.

1 · Geospatial token (Cantor pairing → base-32)

Expected for the demo cell (Table Bay, off Cape Town): 222tNMdG24GnWd. A stranger with a big-integer calculator must get the same 14-char string. Alphabet: 23456789dDFgGhHjJKlLMnNPqQrRtTVW.

2 · Identity association hash (published demo vector)

Only hashes — never raw biometrics — are published or stored on-chain.
association_hash = SHA-256( citizen_id + "|" + lowercase_hex(SHA-256(face-template)) + "|" + device_id )

citizen_id
MC-DEMO-001
biometric input
"demo-face-template"
device_id
demo-device
biometric_template_hash
computing…
association_hash
computing…
matches published
—
stored in Mongo
fetching…
server matches
—

Published constant: 7159c834ce9dec2071d1e22a6caff89ee0b1259e4783b847cff4581afd1ec1d4

3 · Bridge — product hectareId → geo_token (optional)

This shows the internal grid ID and the patent token describe the same cell — hectareId stays the product key, geo_token is the cryptographic one.