You scanned it
This is the demo code from our homepage
It works, which is the whole point of showing it. The pattern you scanned encodes https://qrthatlasts.com/r/demo and nothing else — not this page’s content, not a campaign, just an address we keep answering.
That distinction is the product. If we wanted this code to lead somewhere else tomorrow, we would change where this address points, and every printed copy of that pattern — including any screenshot, any slide, anything someone has stuck on a wall — would follow. Nothing would need reprinting, and the squares would be identical.
It will still work next year. That is an easy thing to write and a harder thing to mean, so: the code was generated once, at build time, and is committed to the repository with a note telling the next person not to regenerate it.
See what it is, or read how to tell whether a code you have already printed can be changed.