With the same goal of adding an extra layer of transparency and demystifying the complex web of multiple resellers, OpenRTB SupplyChain Object enables the buy side to examine all the parties who are selling or reselling a given bid request. 

It consists of a set of nodes, with each node representing an entity participating in the bid request sale. The complete chain of entities involved in (and paid for part of) the sale are then discoverable to the buyer. 

Acting as a record for every impression, Supply Chain Object empowers buyers to check for any fraudulent sellers/resellers and additionally know the final reseller in the chain.