A computer-implemented method of managing energy supply agreements that includes: connecting to a permissioned blockchain, the blockchain being accessible only by energy suppliers, energy transmission companies and government agencies that regulate a market for the supply of energy by energy suppliers to energy transmission companies; creating a new block for an energy purchase agreement that provides for the purchase of energy by an energy transmission company from an energy supplier; appending the new block having the energy purchase agreement to the blockchain; and responsive to the energy supplier supplying a quantity of energy to the energy transmission company in an individual energy transaction, appending the individual energy transaction as a block to the blockchain.