US Patent 11843703 Blockchain-based distributed ledgers for image forming apparatuses

In one example, a cloud printing server may include a processor and a memory coupled to the processor. The memory may include a blockchain management component to register an image forming apparatus with a blockchain associated with multiple entities of a blockchain network, create a distributed ledger relating to the blockchain, create a ledger entry including information indicating operational state and configuration data of the image forming apparatus in the distributed ledger, and transmit an instance of the distributed ledger to the multiple entities including the image forming apparatus.