At https://covr.sos.ca.gov/ I have to positively state that I am a US citizen an tie my name to a driver's license or SSN. Neither driver's license nor SSN confirm that one is a citizen (I had both before naturalizing), but both of them are tied to citizenship information in some database. I know I had to attend the Social Security offices in person to provide proof of my naturalization in order to receive an SSN card without the words "valid for work only with DHS authorisation".