Food Label Symbols What Is The MK Logo Found On Many Food Products, Or COR With A #?

What is the MK Logo found on many food products, or COR with a #? - food label symbols

It is found in many foods in Canada, I see the label COR 290 of congratulations can stewed tomatoes, or MK 699 made in my Fiesta MK garlic and spices, 588 in my box of red beans from Kindey about? No idea what these symbols mean?