An intermediary system of an intermediary agent for intermediating a transfer of an asset between a supplier of the asset and a user of the asset, the intermediary system including circuitry to: receive a request for transfer of a specific asset produced by a specific type of production method from another intermediary system of another intermediary agent; and transmit data related to the asset, to an intermediary node of the intermediary agent on a blockchain network, the intermediary node being capable of sharing data with another intermediary node of the other intermediary agent on the blockchain network, the data related to the asset being for transferring ownership of the specific asset from the intermediary agent to the other intermediary agent.