Sampled at what resolution, though? It’s a physical painting and the true, atomic-scale resolution would make this whole system useless.

May I suggest the entire constitution in ASCII (American Standard Code for Information Interchange) instead? Bonus points if any future amendments change the whole system.

Edit: I suppose you actually want to start small. Maybe just the declaration sans-signatures, then. So, 6610*7 = 46,270 bits.