king repository 
functions. 
Supporting Text 
This is necessary in order to ensure continued access to and tracking of preservation 
functions applied to the digital objects in their custody. 
AUDIT AND CERTIFICATION OF TRUSTWORTHY DIGITAL REPOSITORIES 
CCSDS 652.0-M-1 
Page 5-7 
September 2011 
Examples of Ways the Repository Can Demonstrate It Is Meeting This Requirement 
Documentation of what is being backed up and how often; audit log/inventory of backups; 
validation of completed backups; disaster reco