Sounds like an amazing idea, but I'm sick & tired of most people assuming QR Codes are the only real thing out there.
In reality, there are many different codes out there & Aztec is the overall best!
It is TONS more reliable than QR Codes, especially printed out, in the wild.
Error correction works much smoother, etc. It is also more efficient, if I remember correctly.
https://en.wikipedia.org/wiki/Aztec_Code