A system is disclosed for storage, processing, and accessing of data. The system includes a front end system and a back end system communicatively connected to the front end system. A front end system is configured to provide one or more user interfaces configured to store, process, and access data in a first data server, in response to user input, by sending messages to the back end system. The back end system includes the first data server and one or more processing servers. The one or more processing servers are configured to process messages received from the front end system by accessing in the first data server to perform one or more operations specified by the messages. The back end system also includes a blockchain server configured to maintain a record of changes made to data in the first data server by the one or more processing servers.