Time-stamping is an optional feature to service supports assertions of proof that a document has been archived before a particular time. To do this, it implements the standard RFC3161 (external reference link: https://datatracker.ietf.org/doc/html/rfc3161):
When archiving a document, it sends a time stamp request (TSQ) to the configured time stamp authority (TSA). The TSQ contains a hash value of the content (content digest) archived. The TSA sends back a time stamp response (TSR) including a signed value for the content digest with a time stamp. The TSR is then stored in the archive with the document.
By default, the TSR is only stored at initial archiving of a document (create): When the document is updated, the TSR is not renewed, and TSR validations of the content may fail.
In order to contact a TSA, a HTTP proxy can be configured.
When using the protocol service, the following commands can be recorded for time stamp operations:
createTSRtsrValidatedtsrAndContentValidated