Leaks, whistleblowers. Some circumstantial evidence will also do if there's enough of it. Like having hallucinated parts of code that do absolutely nothing, and can't be explained as e.g. leftovers from a refactor.
And what exactly does it mean to "direct" how the work is constructed?
If I enter dark factory mode and go live my life while it churns tokens, then it's not copyrightable, but if I interact with it at every turn, then it is?