I feel like the joke has been missed.Interesting...
I'll have to read about this. I wonder if it's capable of detecting third and forth order prompt modifications. Once you start asking the AI to change certain things in its responses it becomes your work. Of course, even if that is detectable once a human hand modifies say 10% of the AI responses it would probably succeed in thwarting it.
In the end though, a writer could simply modify the work until it passes the AI detection system.
As for copywritten works, once you change something enough (even a picture) it becomes a unique work of art - so I really don't understand the problem here.
AI detection systems are already famously trash to the point they thing the US Constitution is written by AI.