On September 10, 2019, Amazon launched the Quantum Ledger Database (QLDB). As a ledger database, QLDB is designed to provide an authoritative data source (often known as a system of record) for stored data. It maintains a complete, immutable history of all committed changes to the data that cannot be updated, altered, or deleted. QLDB supports PartiQL SQL queries to the historical data, and also provides an API that allows you to cryptographically verify that the history is accurate and legitimate.
Read the launch announcement over on the AWS blog.