Blockchain-Based Electronic Health Record System

This study presents the design and development of a Blockchain-Based Electronic Health Record (EHR) System aimed at addressing the limitations of traditional paper-based and centralized digital record systems used in small clinics. Conventional health record management faces critical challenges including data vulnerability, unauthorized access, lack of interoperability, and inefficient record retrieval. The proposed system integrates blockchain technology with a secure web-based platform to ensure data immutability, encrypted storage, and patient-controlled access permissions. Developed using Agile methodology and the Iterative Design and Development (IDD) model, the system features a multi-layered architecture combining PostgreSQL for encrypted data storage, Solidity-based smart contracts on the Stellar Soroban blockchain for automated access control and audit trail logging, and a secure web-based platform for patient and provider interaction. Built in partnership with Herbosa Metro Doctors, the prototype was tested using simulated patient data in compliance with the Data Privacy Act of 2012 (Republic Act No. 10173). Results demonstrate that blockchain integration provides a secure, transparent, and tamper-proof approach to managing patient health information, offering a viable solution for small healthcare institutions seeking to transition from manual record-keeping to a modern, secure digital system.

In the age of digital transformation, data has become one

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