A method and system for tracing the identity of an agricultural product comprises holding an agricultural product in a container having a tag. A container identifier of the tag is determined by reading the tag. Ancillary data is generated and is associated with a container location and the reading time. The ancillary data may include a status indicator (e.g., transaction descriptor) for the product, a custodian identifier or both. The container identifier and the ancillary data is transmitted for storage in a data storage system. A product-flow description (e.g., chain of custody) is established for the agricultural product for transport of the product from the origination location to the destination location.