Near Mandalay in Burma, they weave silkworm silk on looms and hand pick patters, on the loom. Certainly they could hand-pick a rMQR code but separate band tag seems simpler. But, either way would probably work.

Manual pattern picking Weaving a longyi at a shop near Mandalay - YouTube. Sounds slow: they supposedly weave an inch a day!

Silk weaving in Amarapura, a small town near Mandalay

Silk patterning, done entirely by hand

Sources