The consent provided for in this act shall be executed and acknowledged by both the husband and wife and the person who is to perform the technique, and an original thereof may be filed under the same rules as adoption papers in the district court of the county in which such husband and wife reside. The written consent so filed shall not be open to the general public, and the information contained therein may be released only to the persons executing such consent, or to persons having a legitimate interest therein as evidenced by a specific court order.