Right, we are on the same track here.

At my last job in the Belgian Air Force, before retirement,  I was reponsable for the application of Standards and Norms.
ISO, DIN, EN Norms, Stanags, and so on. (including copyright issues)
So I know their value in court.
It is rightfully very wise to think about it beforehand.

As you clearly did.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!