Is the bead ring on the tire concentric with the edge of the wheel rim all the way around on both sides? If it is, it might well have seated without you hearing a pop, especially if you've got 70 psi in it. If you've got that much air in the tire and you don't think the bead is seated, it should be easy to tell where it's not if the tire has a bead ring. I've never used a tire that didn't have one.
If those rings aren't concentric, you've probably got some inner tube between the tire and the rim somewhere and the bead ring on the tire should let you know where that is.
I've never had to use anywhere near 70 psi to get a front tire seated and, although I would certainly check that bead ring to make sure everything is as it should be, I would bet it just set without a pop if all surfaces were cleaned and lubed before you started inflating it.