i'm looking at your SVG code now on my phone, thanks
I realized that it is maybe non-trivial to get the qr-code into an svg-file.
In order to get a rather small qr-code I stripped a lot of meta-data from the original svg-file as it came out of inkscape.
... uhm ... opening the file on my desktop works. In the browser it doesn't. Crippled too much, but you get the idea
Here is the svg:
<svg width="157" height="29">
<tspan x="167" y="144">See?</tspan>