Soak chickpeas overnight in a large bowl with a lot of cold water and 1 tsp baking soda
Drain soaked chickpeas and add them to medium pot with at least 4 inches of water. Add the other tsp of baking soda and bring to a boil. Reduce heat to medium-high and vigorously simmer until chickpeas are very soft, 1 - 1.5 hours. Overcooking them isn't really a problem. Once cooked, drain
Combine lemon juice, garlic, and 1/4 tsp salt in blender. Let sit 10 minutes
Add tahini, cumin, and remaining 1.5 tsp salt to blender. Blend until a thick paste forms. Add 1/3 - 2/3 cup ice water while blender is running, a little at a time, until sauce is smooth. You want it to be perfectly smooth and creamy
Add drained chickpeas to blender and blend until perfectly smooth. This may take awhile. You may need to add a bit more water
Season to taste with more salt, lemon juice, and cumin as needed
To serve, dust with paprika and drizzle with olive oil. It helps to make some dips in the hummus to pool extra olive oil in