What is the burden of proving the elements of an alleged sentence enhancement beyond a reasonable doubt?

"The People must prove all elements of an alleged sentence enhancement beyond a reasonable doubt." (People v. Miles (2008) 43 Cal.4th 1074, 1083.) " 'As a practical

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matter, . . . prior convictions are normally proven by the use of documentary evidence alone.' [Citation.] 'Once the prosecutor presents this prima facie evidence of conviction, the trial court is allowed to make reasonable inferences from the facts presented. If there is no evidence to the contrary, the trial court may consider the abstract and the facts of the particular case, and utilizing the official duty presumption, find a defendant was convicted of and served the term of imprisonment for the listed felony.' [Citation.]" (People v. Prieto (2003) 30 Cal.4th 226, 258.)

"On review, we examine the record in the light most favorable to the judgment to ascertain whether it is supported by substantial evidence. In other words, we determine whether a rational trier of fact could have found that the prosecution sustained its burden of proving the elements of the sentence enhancement beyond a reasonable doubt. [Citations.]" (People v. Delgado (2008) 43 Cal.4th 1059.)