The medical record exchange (EMR) between hospitals is a challenge in medical health. The health information data are sensitive and require the utmost privacy. This research proposes an improved new process for the hospital context, which is based on Blockchain technology. A key characteristic is the general distributed method with the consensus mechanism, which gives the benefits of immutability, security, trust, and near-real-time transactions. This study designed the standard data structure under HIPPA Law and GDPR regulations. These fields have been encrypted on the system architecture, which builds on the Hyperledger Fabric using chaincode validation. The scenario testing illustrates a proof of concept, which is on the real environment and simulated medical records, in terms of throughput, fault tolerance, and immutability. Performance analysis confirms that Blockchain technology is valuable and meaningful to the healthcare system. This research also found that the medical Blockchain provides absolute real-time EMR with security.
