Blockchain technology developed in 2008 as part of a proposal for the Bitcoin virtual currency system—eschewing a central authority for issuing currency, transferring ownership, and confirming transactions.1 Before understanding its value for the goal of accurate, auditable, and easy of accessing medical record data on a global basis while still maintaining the security desired and mandated by the Health Insurance Portability and Accountability Act of 1996 (HIPAA), you must understand how it works.