How to detect if a Win8.1 ISO contains upd1 and upd2?

Assume I have prepared some Win8.1 ISOs backups from my original system with slipstreamed update 1 and eventually update 2.

Now I fetched out such an ISO archive.
How can I find out now if such a ISO already contains update 1 or even update 2?

Is there somewhere a files with history/changelog?
Or is there a special file on it which indicates the release version and if updates are emebedded?

Peter

Mount your ISO and run from command prompt (either, depending on file type)

Dism /Get-WimInfo /WimFile:X:\sources\install.esd /index:1
Dism /Get-WimInfo /WimFile:X:\sources\install.wim /index:1

X = Mounted ISO drive letter