Cal. Evid. Code § 1603

A deed of conveyance of real property, purporting to have been executed by a proper officer in pursuance of legal process of any of the courts of record of this state, acknowledged and recorded in the office of the recorder of the county wherein the real property therein described is situated, or the record of such deed, or a certified copy of such record, is prima facie evidence that the property or interest therein described was thereby conveyed to the grantee named in such deed. The presumption established by this section is a presumption affecting the burden of proof.