Where does the data for NBS vs OT come from?

From PandaScore League of Legends match records, refreshed about every five minutes. The page shows when it was last updated.

What format is NBS vs OT?

NBS vs OT is listed as BO3 at Hitpoint Masters.

League of LegendsResults

Source: PandaScore · Updated: Aug 11, 04:54 PM UTC

NightBirds0123456789

Onion Team0123456789

#1NightBirds22 min

#2NightBirds23 min