The basic idea is that you crack an Origin+Denuvo game with Anadius's Origin Unwrapper+Emulator, then when you start the game it will pop up a notification with a code that will be generated based on your current system configuration. You give that code to someone who owns the game, and they can forward that to the Denuvo servers and ask for a legit response token for that code. They give you the legit token back, you put it in your anadius.cfg, and then the game will work until your system configuration changes.
Anadius has an automated system set up on cs.rin where you can ask for tokens based on a first-come-first-serve queue (since you can only ask Denuvo for a token so many times per day/week/etc, legit owners need to donate their activation limits)
I'll note this also works on Linux/Wine (though changing Wine config invalidates token)
Look for Anadius Origin Emulator under the cs.rin Releases forum to learn more