The output indicates whether the file remains unchanged or has been modified or deleted.
These timestamps are compliant with the timestamp and revocation features described in Part 4 of ETSI 102 778 If the signature status is unknown or unverified, validate the signature manually to determine the problem and possible solution.
You can apply a certifying signature only if the PDF doesn’t already contain any other signatures. A blue ribbon icon in the Signatures panel indicates a valid certifying signature.
A digital ID is required to add the certifying digital signature.
The command uses the digest files delivered to your Amazon S3 bucket to perform the validation.
For information about digest files, see Cloud Trail Digest File Structure.