If you would like to do this programmatically there is an XPIF sample-sheet option which might be what you are looking for. You however need to apply for the SDK here https://www.xerox-solutions.net/developers where you can find the FreeFlow Press SDK which has an XPIF programming guide.
I would use the Split node -- split the top page from the rest of the job. Print the top page using the top tray and copy count of 2. Print the remainder to the desired output location.
We have a DP180, and here's what i'm trying to achieve.
I want to (progromatically) print a copy of the first sheet of every job from the top output for quality control purposes, perferably through XPIF
P.s. I noticed an option for "auto proof" in the queue settings but I wasn't able to actually make it work