Where does the data for WS vs CIS come from?

From PandaScore Dota 2 match records, refreshed about every five minutes. The page shows when it was last updated.

What format is WS vs CIS?

WS vs CIS is listed as BO1 at PARI Universe.

Dota 2Results

Source: PandaScore · Updated: Oct 31, 07:28 PM UTC

WOWorld Squad0123456789

CICIS Squad0123456789

#1CIS Squad41 min