Ohio Rev. Code § 2129.05
Authenticated copies of wills of persons not domiciled in this state, executed and proved according to the laws of any state or territory of the United States, relative to property in this state, may be admitted to record in the probate court of a county where a part of that property is situated. The authenticated copies, so recorded, shall be as valid as wills made in this state.
When such a will, or authenticated copy, is admitted to record, a copy of the will or of the authenticated copy, with the copy of the order to record it annexed to that copy, certified by the probate judge under the seal of the probate court, may be filed and recorded in the office of the probate judge of any other county where a part of the property is situated, and it shall be as effectual as the authenticated copy of the will would be if approved and admitted to record by the court.
R.C. § 2129.05