official history; authorized history
Refers to a history compiled or recognized by a government or authority, as opposed to private or unofficial histories. Often used in contrast with 野史 (unofficial history).
See also: 正式の歴史
中国の正史は二十四史と呼ばれている。
The official histories of China are called the Twenty-Four Histories.
この事件は正史に記録されていない。
This event is not recorded in the official history.
From Chinese 正史 (zhèngshǐ), meaning 'standard history' or 'official history'. The term was adopted into Japanese with the same meaning.