What is the standard for determining whether a defendant has been found guilty beyond a reasonable doubt?

We review "`the whole record in the light most favorable to the judgment' and decide `whether it discloses substantial evidence ... such that a reasonable trier of fact could find the defendant guilty beyond a reasonable doubt.' (People v. Johnson [(1980)] 26 Cal.3d 557, 578 [162 Cal.Rptr. 431, 606 P.2d 738].) Under this standard, the court does not `"ask itself whether it believes that the evidence at the trial established guilt beyond a reasonable doubt." [Citation.] Instead, the relevant question is whether, after viewing the evidence in the light most favorable to the prosecution, any rational trier of fact could have found the essential elements of the crime beyond a reasonable doubt.' [Citation.]" (People v. Hatch (2000) 22 Cal.4th 260, 272, 92 Cal.Rptr.2d 80, 991 P.2d 165.)