The horizontal line are certainly leftover/missed heavy grit scratches. The vertical line are also "scratches", but appear to have come from some kind of "rubbing" or "dragging" motion that happened to the blade prior to hardening (the "bumps" in the bottoms are the give away) The first thing that popped into my mind was a bit of careless handling, and something either got piled upon the blade. Or something got dropped on it????