If you are a citizen of another country and you sign up with CD Baby Pro, we register your works with collection societies all around the world to ensure that all of your publishing performance and mechanical royalties are accounted for. If you do not have US representation, we won't be able to disperse your royalties appropriately. In order for us to do so, we need you to select a US PRO that will represent you.
Since the US has multiple PROs (ASCAP and BMI being the main ones), you have the option to select which US PRO you would like to monitor and collect your performance royalties that are generated in the US.
We will register your works with this PRO for this reason, but you will not be affiliated with the US PRO you select, as songwriters are only able to be affiliated with one PRO.
Unfortunately, we can't advise you on which PRO to choose. We suggest you research ASCAP and BMI and see what is the best fit for you. Sometimes it can help to search for your favorite artists and songwriters in the PRO's repertories and see where those artists have their affiliations.