In case any one else runs in to a similar question. I went through a bunch of different IRS docs explaining what needs to be done. There is a Publication 515 which details how much taxes are to be withheld depending on the type of income paid to foreign individuals or entities. Then I found each treaty from the countries we have artists in who we pay royalties to for their work. The treaties typically state withholding is 0% but some only change the default withholding for royalty income from 30% to something less. Finally, there are forms 1042 and 1042-S. The form 1042 helps you fill out 1042-S which is the one you would file and the one you would give a copy to to all foreign individuals even if no taxes were withheld. Hopefully this helps any one else in the future.
