  In recent years, many Blockchain based frameworks for transacting commodities
on a congestible network have been proposed. In particular, as the number of
controllable grid connected assets increases, there is a need for a
decentralized, coupled economic and control mechanism to dynamically balance
the entire electric grid. Blockchain based Transactive Energy (TE) systems have
gained significant momentum as an approach to sustain the reliability and
security of the power grid in order to support the flexibility of electricity
demand. What is lacking in these designs, however, is a mechanism that
physically verifies all the energy transactions, to keep the various inherently
selfish players honest. In this paper, we introduce a secure peer-to-peer
network mechanism for the physical validation of economic transactions cleared
over a distributed ledger. The framework is $\textit{secure}$ in the sense that
selfish and malicious agents that are trying to inject false data into the
network are prevented from adversely affecting the optimal functionality of the
verification process by detecting and isolating them from the communication
network. Preliminary simulations focusing on TE show the workings of this
framework.
