Wiktionary
of record
prep.phr. 1 Officially recorded; documented. 2 authoritative.
Usage examples of "of record".
Athens in the period of recorded history, of Pericles and Plato and the time of the wars with Sparta, the scenes of history were bathed in these radiant and perfect lights and weathers.
Eric thrilled with the pride of belonging to a race that had worked out a system of recorded signals as clever as the alphabet, that could take ordinary numbers and squeeze them into unrecognizable shapes, pulling out a piece here, a piece there.