ProvenDB is a MongoDB compatible database service that combines traditional database capabilities with Blockchain characteristics such as immutability. Using ProvenDB, you can write applications which anchor data to a public Blockchain, providing cryptographic proofs of the integrity and history of the data. ProvenDB offers most of the functionality of MongoDB, but adds the following features: Immutable data: By default, data in ProvenDB is not destroyed when update or delete operations are issued. Old versions of data remain available indefinitely. Versioned data: Multiple versions of the database state are maintained. The user can navigate to a previous version effectively moving back in time. Blockchain proofs: Database versions and individual documents can be anchored to the Blockchain. These Blockchain proofs can be used to prove the existence, ownership and integrity of individual documents or a complete database version Data provenance: The complete history of a data item can be retrieved, with Blockchain proofs testifying to that history. You can use ProvenDB: • To prove you created some content. • To prove that a document or data has not been tampered with or altered. • To prove the data of a legal or official document. • To prove the exact history (provenance) of some data. ProvenDB is particularly useful for: • Document Management Systems • Intellectual Property and Media Management Solutions • Legal Record Keeping • Government and Regulatory Applications • Accounting Systems • Audit and Access Management Systems