Described herein includes a data controller that secures personal data and efficiency and reliably records data access events using blockchain. The system may include a data controller for: receiving a request to access data stored in a database on the data controller, the request including a web token; verifying the web token of the request; providing access to the data stored in the database; generating a data access event indicating that the data stored in the database has been accessed; and recording the data access event on a blockchain platform in accordance with blockchain.