Anyone who wants one can get a copy of their official criminal history from the State of California. This criminal record is the same record that law enforcement uses and many private and governmental employers.
To get a copy of your own record you will need to visit the official website of the California Department of Justice. Here is a link to the website: California Criminal Record
The State will require you to get fingerprinted and send in the Livescan along with a check for $25. The process take some time, usually several weeks so get started early if you will be needing it soon.
Knowing what is actually on your record is important do that you can correct any incorrect information or errors.