It is the policy of the state of Connecticut to make available to adopted and adoptable persons who are adults (1) information concerning their background and status; to give the same information to their adoptive parent or parents; and, in any case where such adopted or adoptable persons are deceased, to give the same information to their adult descendants, including adopted descendants; (2) to provide for consensual release of additional information which may identify the biological parents or relatives of such adult adopted or adoptable persons when release of such information is in the best interests of such persons; (3) except as provided in subdivisions (1) and (4) to (6), inclusive, of this section, to protect the right to privacy of all parties to termination of parental rights, statutory parent and adoption proceedings; (4) to make available to any biological parent of an adult adopted or adult adoptable person, including a person claiming to be the father who was not a party to the proceedings for termination of parental rights, information which would tend to identify such adult adopted or adoptable person; (5) to make available to any adult biological sibling of an adult adopted or adult adoptable person information which would tend to identify such adult adopted or adult adoptable person; and (6) to make available to any adult adopted person eighteen years of age or older or such adopted person’s adult child or grandchild a copy of an original birth certificate, as provided in section 7-53 or 45a-751c.