Ohio Rev. Code Ann. § 5310.03

The original certificate of title in the register of titles, any copy of it certified under the signature of the county recorder, and the owner's duplicate of the original certificate of title shall be received as evidence in all the courts of the state and shall be conclusive as to all matters contained in it, except as provided in this chapter or Chapter 5309. of the Revised Code. All subsequent certificates of title and memorials on them shall be conclusive in favor of bona fide owners and holders except subsequent certificates and memorials on them procured by forgery.