Okla. Stat. tit. 66 § 15
Every conveyance or lease, deed of trust, mortgage or satisfaction thereof, made by any railroad corporation, of any franchises, real estate fixtures, or other real property, in pursuance of law, shall be executed and acknowledged in the manner in which conveyances of real estate by corporations are required to be, to entitle the same to be recorded, and shall be recorded in the office of the Secretary of State, who shall endorse thereon his certificate thereof, specifying the day and hour of its reception, and the volume and page where recorded, which shall be evidence of such facts. Every such record of any such instrument shall, from the time of reception, have the same effect as to any property in this state described therein, as the record of any similar instrument in the office of a register of deeds may have by law as to property in his county, and shall be notice of the rights and interests of the grantee, lessee, or mortgagee, by such instrument to the same extent as if it were recorded in each and all of the several counties in which any property therein described may be situated.
Okla. Stat. tit. 66, § 15