Many people find a need to get a copy of their own criminal records, for example, when you are searching for a new job it is helpful to know what is on your public record. The best way to get a copy of your criminal background is through the California Department of Justice. They maintain all records relative to convictions in California.
Private companies that offer a copy of your background may not provide complete information so it is best to go directly to the government entity that maintains those records.
Here is the link to get started:
Get a copy of my criminal records in California