Historical Record
Cyprian's commemoration appears on July 5 in the synaxaria, though some recensions (such as the OCA listing) preserve no biographical detail. The fuller account is transmitted in the Prologue of Ohrid and in the broader new-martyrologion tradition of the Ottoman period.
His martyrdom is reported to have been recorded by John Karyophyllis (Ioannes Karyophylles), a contemporary witness to the events at Constantinople, which places his death within the documented wave of Athonite and Greek new martyrs who openly confessed Christ before the Ottoman authorities.