Make the hollandaise: Place egg yolks and lemon juice in a blender. Blend on medium speed for 30-60 seconds until pale yellow and slightly thickened.
With the blender running on low speed, slowly drizzle in the hot melted butter in a thin, steady stream over 1-2 minutes. Continue blending for 30 more seconds.
Season with salt and white pepper. Taste and adjust seasonings. Transfer to a warm bowl, cover, and keep warm over (not in) warm water.
Prepare the components: Toast English muffin halves until golden brown. Keep warm in a 200-degree Fahrenheit oven.
Warm Canadian bacon or ham in a skillet over medium heat until heated through and slightly browned, about 2-3 minutes per side.
Poach the eggs: Fill a large pot with 3-4 inches of water. Add white vinegar and bring to a gentle simmer (small bubbles, not rolling boil).
Crack each egg into a small cup or ramekin. Create a gentle whirlpool in the water with a spoon, then slide the egg into the center.
Cook for 3-4 minutes for runny yolks, or 4-5 minutes for medium-set yolks. Remove with a slotted spoon and drain briefly on paper towels.
Assemble: Place 2 slices of Canadian bacon on each toasted English muffin half. Top with a poached egg, then spoon warm hollandaise sauce generously over the top.
Garnish with chopped chives, parsley, and a sprinkle of paprika. Serve immediately while warm.