How to find DRM protected WMA files on Ubuntu Linux

On my **Ubuntu Linux 18.04** machine I have a whole bunch of WMA files (don't ask) which have gotten mixed up with several files from another computer that are DRM protected. The latter won't play and even crash some player software. Is there a quick-and-easy way to recurse through the entire subdirectory tree and detect which WMA files are DRM protected? I've seen solutions based on Windows XP and Powershell, but nothing for *ix. Mind you, I'm NOT looking for a (legally dubious) way to strip off the DRM protection; I just need to find out which ones are DRM protected without trying them out one by one so I can remove them. Advise to discontinue the use of WMA and switch to more sensible formats instead is unnecessary; I never use WMA if I can possibly avoid it. However, the people who pay for my meal ticket require me to support this [censored] so I have little choice.