I noticed after mounting some new tyres that part of the side wall, just above the bead, seems to have been damaged while I was fitting them (see photos below).
These tyres were especially difficult to mount, even with the bead seated in the rim's bead well all the way around. So tight, in fact, that the only way to get the bead out of the well and seated under the bead hook was to pump it up to a much higher pressure than I would ride it with and wait for it to "ping" into place.
I think it's this process that ended up causing the damage you can see in the photos. The tyres in question are these (folding version).
Have I compromised my tyres, or should I not worry about it?