Okla. Stat. tit. 67 § 81
The board of county commissioners of any county, created in whole or in part out of any county or counties, of the Territory of Oklahoma, or to which territory taken from any other county may have been attached, is hereby authorized and empowered to demand and secure the original taxrolls, or a duly authenticated copy of the same as herein provided of all of the property situated in all new counties formerly a part of the old counties, and to copy or transcribe, or to make contracts to procure copies or transcripts in substantial record books such as are required for said instruments, the same to be furnished by said counties so transcribing or copying the same at a rate not to exceed five cents ($0.05) per folio, of the records and government field notes of any county so divided, or from which territory may have been taken necessary to complete the records, so that the said counties may have a complete record of any such county or territory so affected. The party making such transcript or copy of records and files, shall verify and certify under oath to the accuracy of any such copy, copies or transcripts, and such copy, copies or transcripts, so verified shall, after approval by the board of county commissioners of said new county be treated for all purposes as the original records of such county. One certificate attached to each separate volume of such records or any portion thereof, identifying the same by proper recitals, to be made under the direction of the board of county commissioners, shall be deemed for all purposes a sufficient authentication of such record.
Okla. Stat. tit. 67, § 81