4.2.9 - The repository shall provide an independent mechanism for verifying the integrity of the repository collection/content.
This is necessary to enable the audit of the integrity of the collection as a whole.
Examples of Ways the Repository can Demonstrate it is Meeting this Requirement
Documentation provided for 4.2.1 through 4.2.4; documented agreements negotiated between the producer and the repository (see 4.1.1-4.1.9); logs of material received and associated action (receipt, action, etc.) dates; logs of periodic checks.