  We consider the problem of supply chain data visibility in a
blockchain-enabled supply chain network. Existing methods typically record
transactions happening in a supply chain on a single blockchain and are limited
in their ability to deal with different levels of data visibility. To address
this limitation, we present FoodFresh -- a multi-chain consortium where
organizations store immutable data on their blockchains. A decentralized hub
coordinates the cross-chain exchange of digital assets among the heterogeneous
blockchains. Mechanisms for enabling blockchain interoperability help to
preserve the benefits of independent sovereign blockchains while allowing for
data sharing across blockchain boundaries.
