Any person having the legal capacity to own land in the Territory of Guam, who has an unbroken chain of title to any interest in land by himself and his immediate and remote grantors since January 1, 1935, and is in possession of such land, shall be deemed to have a marketable record title to such interests, subject only to such claims thereto and defects of title as are not extinguished or barred by the application of the provisions of this Chapter and instruments which have been recorded since