A computing system for achieving traceability in a food commodity supply chain is provided, including a server computing device configured to receive a message indicating an optical code associated with a unit of a food product has been scanned by a camera-equipped computing device at a location, in which the message includes a product unit-specific identifier encoded in the optical code. The server computing device is further configured to identify in a database, a merchant record including the product unit-specific identifier and a merchant identifier of a merchant at the location. The server computing device is further configured to trace a supply chain path of the unit of the food product through additional records in the database that are linked to the product unit-specific identifier, and output supply chain derived information on the unit of the food product based on the traced supply chain path.