[015a]

For now. As an example, there are Amazon Prime discounts available at Whole Foods, and this QR code which asserts your membership cannot be printed because it embeds an OTP-like temporal code which changes every 60 seconds.

Any QR code which can be printed, can be copied. There's a vested interest for the operators of these systems to reduce the copyability of these codes (think: vaccine passports). Embedding a temporal code, changing the QR code every few minutes, and invalidating old codes, essentially OTP, is the most straightforward and industry standard way of doing this; it's inevitable.