Ohio Rev. Code Ann. § 5301.06

All deeds, mortgages, powers of attorney, and other instruments of writing for the conveyance or encumbrance of lands, tenements, or hereditaments situated within this state, executed and acknowledged, or proved, in any other state, territory, or country in conformity with the laws of such state, territory, or country, or in conformity with the laws of this state, are as valid as if executed within this state, in conformity with sections 1337.01 to 1337.03, inclusive, and 5301.01 to 5301.04, inclusive, of the Revised Code.