Health maintenance organizations, doctors, hospitals, and various medical institutions provide large amounts of medical data to each of us. All these important data should be preserved to be viewed anytime and anywhere via Electronic Health Records (EHRs). Electronic Health Records mainly contain the patient's medical information, such as the patient's medical history, appointments, diagnosis, medicines, prescriptions, and current treatments. EHRs are often administered by a single vendor, which implies that all personal information is saved in data sets controlled by the vendor in charge of the archives. The requirement for a strategy and the vulnerability in security frameworks, EHR theft is rapidly becoming common. The novel framework built upon blockchain offers unparalleled security, transparency, and efficiency in handling sensitive medical information. By leveraging blockchain's decentralized architecture, patient records are securely stored across a distributed network, ensuring tamper-proof data integrity and protection against unauthorized access. The Healthcare Record Chain Management (H_RCM) framework introduces a paradigm shift, enabling seamless interoperability among healthcare providers while maintaining patient privacy through cryptographic techniques. Moreover, smart contracts are embedded within the blockchain streamline administrative processes, automating tasks such as insurance claims and billing. As a result, the adoption of this innovative approach not only enhances data security and interoperability but also fosters trust among stakeholders, ultimately improving the quality and accessibility of healthcare services. The findings of the system were validated using real-life scenarios of various use cases and compared to the conventional health record system.

Keywords： electronic health record ; smart contract ; consensus protocols ; electronic medical record ; Ethereum ; scalability