I can't find the link between person and film, but it needs correcting

@Maya​ Thanks very much. I have since found that the situation is rather complicated, as there is an album which includes some but not all tracks (and some new ones), and some music sites do list a track by Caroline Shaw. However, at this stage I have drawn a blank (even with AI help) as to finding a separate reliable source listing all of the tracks featured in the film - which according to the music listing sites, are well over 30. The press kits appear to be no longer available so it is now impossible to verify using online sources.Thanks anyway for your help.

Hi, Mels:

I can confirm that Caroline Shaw is listed in the on-screen credits of Tár.

Thanks! Do you have a source other than imdb for this? 

Yes, I saw the film's own titles.

@ljdoncel​ thank you, that's great to have this confirmed. I was hoping to have a citation to add to Wikipedia, but this doesn't seem to exist. (I can try using IMDb, but it's likely to be removed, as it's not regarded as a reliable source.) Anyway, at least I know now! 

I was going to leave it at that, because it bothers me a little to publish sources and evidence only for someone to delete them later without taking any action, but since your purpose is to collaborate with Wikipedia, here is the reference:

Cheers!

Thanks!