Your ke9gdp.com account.
Upload your licence exactly as issued (the official document as a PDF or a picture, not edited or cropped). It is stored privately, looked at once by the site owner, and deleted when the decision is made. Details are in the privacy policy.
One ke9gdp.com account works for CSVF2 and the rest of this site. The account is approved only after you confirm your email and send your licence, which I check by hand.