Is there a website that I can search for all products certified by USDA with one of the 4 organic labels:   100% Organic Organic Made with Organic Some Organic ingredients   For example, how can I found a list of brands sell sugar that is labelled "100% organic" by USDA? 
The USDA Organic Integrity Database people search for Organic certifications and the foods lists the foods they were certified for.  https://apps.ams.usda.gov/Integrity/  