CD Baby reports all CD sales to SoundScan on a weekly basis. In addition to physical CD sales, CD Baby also reports digital album and single-song sales to SoundScan.
In order to be eligible for SoundScan reporting, a UPC barcode must be assigned to your album.
You can register your album with Nielsen SoundScan to ensure that your sales are properly credited to you by visiting: http://titlereg.soundscan.com/soundscantitlereg.