Technologies are generally described to monitor an ingress and egress of data to and from platform provided storage. In some examples, a data scrubbing certification module of a platform may be configured to determine an existence of a data retention and elimination policy of a service associated with an application executed at the platform, where the service may store application data within a data store of the platform. The data scrubbing certification module may activate a certification process for the application, and the data store may receive the application data inserted with one or more sentinels from the service such that the data scrubbing certification module may track the sentinels to verify an ingress and egress of the application data to and from the data store. Evidence that the service is compliant with the data retention and elimination policy may then be provided to the application based on the verification.