he data transfer and ingest process. Other 
sources will include technical and descriptive metadata obtained prior to ingest and may also 
include expectations set by the depositor, the object producer, a format registry, or the 
AUDIT AND CERTIFICATION OF TRUSTWORTHY DIGITAL REPOSITORIES 
CCSDS 652.0-M-1 
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September 2011 
repository’s own expectations. The extent to which a repository can determine correctness 
will depend on what it knows about the SIP and what tools are available for verifying 
