Immutable EHR Ledger Architecture Without Blockchain Mining

The patent extracts the core immutability function from the resource-intensive proof of work consensus mechanism. It implements a simplified immutable ledger that records database operations without requiring mining, validation nodes, or complex consensus protocols. The system achieves immutability through cryptographic hashing and sequential block chaining while removing the energy-consuming proof of work element entirely.

The patent replaces expensive, resource-intensive blockchain mining with a lightweight, efficient data structure that achieves the same immutability goal at minimal cost. The immutable ledger uses simple cryptographic operations and sequential writing rather than repeated mining attempts, dramatically reducing computational resources and energy consumption while maintaining data integrity.

The patent performs preliminary recording of the current data state before applying updates. Each database operation is first captured as an immutable record in the ledger, preserving the historical state. Then the update is applied to the current data. This preliminary action ensures that historical information is preserved while allowing efficient modifications to proceed.

The patent introduces an intermediary immutable ledger that sits between the database and the update operations. Instead of directly overwriting data, updates are mediated through the ledger which records the operation. This intermediary layer preserves historical data by capturing each change while still allowing efficient updates to be applied to the current state.

The patent inverts the traditional approach by making the log immutable rather than the database state. Instead of maintaining a mutable database with optional logging, the system creates an immutable ledger that records all operations. The ledger becomes the source of truth, and the database state is derived from it. This inversion ensures both complete history preservation and data integrity simultaneously.

The patent replaces expensive, complex logging mechanisms with a simple, lightweight immutable ledger structure. The ledger uses basic cryptographic hashing and sequential block writing rather than complex logging infrastructure. This simplified approach achieves complete history preservation and data integrity at minimal resource cost, unlike traditional logging systems that compromise integrity.