CA Civ Proc Code Section 770.070

(a)

At the time fixed for the hearing or such time thereafter as may be fixed by the court, the court shall hear the proofs offered by the petitioner and by any persons answering the petition, and shall make and enter a decree determining the identity of the person or persons set out in the petition in accordance with the proofs.

(b)

An appeal may be taken by any party aggrieved.