I need to release my unreal project as open source in order to provide the assurance of safety and transparency to user’s who are executing my packaged game.
The compiled/packaged game would need to be demonstrably derived from the open source code, is this possible?
Unreal Engine is not open source. If your assets are not the ones Epic provides freely that are to be exclusively used in UE, you can share them publicly along with your own code for the game. You cannot distribute any engine code, neither projects made with some of it.
No, you’re not allowed to do that.
Hope this helps 
I see, I have heard a similar thing before.
Im guessing there is currently no system in place achieve what I am asking, however I thought it should technically and legally be possible, as the engine source code is already on github.
Imagine if github could build your project using epic’s engine repo. This would achieve my goal, however afaik its not possible with the systems currently available.