Your link is encoded straight into the code. There is no redirect in the middle, so nothing tracks the scan, nothing expires, and no one can switch where it points later. Download a PNG, or an SVG that stays razor sharp at any print size.
Use the SVG for anything printed. It is made of shapes rather than pixels, so it stays perfectly crisp whether it goes on a business card or a trailer wrap.
Keep it at least 0.8 inches across for a hand-held scan, and leave the quiet border alone — scanners need that empty margin to find the code at all.