This scenario is simplified in that it does not describe any configuration, server setup or advanced features etc.
The user or system, called requester, sends a timestamp request in accordance with RFC3161.
The timestamp service detects if it is a timestamp request and if so redirects the request to the proper policy within the backend.
The backend handles the policy and all the included filters according to the order in the configuration.
The backend stores the information in the logs and database according to the configuration.
After successful timestamp request a timestamp response is generated and sent back to the HTTP frontend.
The HTTP frontend sends the timestamp response back to the requester.