The only way to put 26 inch tires on a 700c bike is to use different wheels. You cannot mount a 26 inch tire on a 700c rim.
I think you are making this harder than it is. Any 700 type tire should fit on your rims. Don't worry about inside or outside diameters. The only thing you need to worry about is the width of the tire and whether it will clear your forks, chainstays, and brakes. If you have V-brakes, then they will be fine.
Hybrids usually have plenty of clearance for wider tires, but you won't know for sure without measuring your clearance or trying a tire.