Abstract: A computer system and method that implements data security with the use of blockchain key encryption for healthcare records that can be accessed across multiple computer systems. The use of one or more blockchain ledgers allows the securing of data with different sets of keys between the computer platforms such that data can ultimately be secured only by the entity that controls the computer system with the healthcare records, with the security system itself only verifying and securing the user's identification data. The system therefore allows the healthcare provider to maintain mandated levels of data security for their stored records, but also allows a user of the system to provide access to other healthcare providers to the records for that user which are resident across multiple computer systems.