Largely, we are relying on the broadcaster to correctly fill the cue sheet with your information. To help as well as you can with this, you need to make sure that the customer can easily find your details both on your profile/item pages and, as @RedOctopus suggests in his brilliant Community Guide, put a PDF file in your items’ .zip file that contains all of your details.
Also, check out his PRO Guide. It is a great resource for folks getting started with PRO registration.
ASCAP also use Soundmouse, although I’m not sure to what extent. Definitely worth uploading and registering your tracks there though.
You can also register your recordings with Tunesat to help you track your music in broadcasts.