RetailOrg · Kreuzberg F2T
Whoever scans is the identified witness of this checkpoint.
from Hof Grüneberg · 4.1 km — verify the chain on receipt, then accept into stock.
Print a table-tent QR so diners scan it and meet the farmer behind their food.
Verified origin is your edge against anonymous supermarket produce.
Prototype surface — full flows wire to the FastAPI backend (POST /api/lots/{id}/events, GET /api/passport/{slug}).