I mean the first method, of course
And TBH, I really don't think the bolt would refuse to budge. You're exerting A LOT of force on the crankshaft NOT to get that bolt loose. The worse thing I can think of would be shearing off the bolt, which I would also doubt, due to the density of the bolt.
Lets put it this way, you would have to imagine that they are erring on the side of caution when they manufacture the car, so they would take into account any "un-natural" possibilities, like the crank pully seizing due to a component failure.
Besides, I've done it and had zero difficulty doing so. The only issue I encountered, was pulling the pully off of the shaft, which actually wasn't that difficult if I had just pulled evenly while squared against the pully. Popped right off once I realized I would have to lightly "jiggle" the pully as I tugged it off
