Okla. Stat. tit. 12, § 12-3008: Functions of judge and jury

When the admissibility of other evidence of contents of a record

depends upon the fulfillment of a condition of fact, the question

whether the condition has been fulfilled is ordinarily for the court

to determine in accordance with the provisions of Section 2104 of

this title. However, when an issue is raised questioning:

1. Whether the asserted record ever existed;

2. Whether another record produced at the trial is the

original; or

3. Whether other evidence of contents correctly reflects the

contents;

the issue is for the trier of fact to determine.