It's a V-shaped deep scratch. It goes over the rims, and the raised area you see or feel is due to the metal rising up from the cut into the coin.
And then you tossed it back into circulation only to be found by someone and posted here as a "$UPER RARE MINT ERROR $TAMPING"
All of the past newbie threads for Missing Clad layers and Nickels struck on Cent planchets over the past 8 months are because of thousands of Environmental Damaged coins I dumped into a CoinStar machine once! I found them all metal detecting!
The lines were raised off of the surface of the coin and not dug into it,otherwise I wouldnt have even bothered posting it.
That last (edge-on) photo looks like something very sharp sliced into the coin at a shallow angle...?