Confirmation requirements can vary. A state of confirmation is generally as defined by the entity requiring it. In the case of QRZ, a confirmation requires that both parties have a record of the QSO in their respective logbooks that each match with respect to callsigns, band, mode, and date/time within a 30-minute window. You are entitled to disagree, nonetheless this is the standard set to achieve a QRZ confirmation. If a confirmation based on an erroneous claim is attempted, it would require both parties to so participate - a less likely occurrence.