Just look at the wrapper on the roll. As for TCS, we never bothered with it after seeing it used as flashing on a slate roof. It corroded into dust in less than 40 years. I have some TCS valley I removed from a house 40 years old. It had been patched many times, over and over starting in it’s 20th year.
I notice in your specs that the sleepers are above the felted and I&W deck. It seems the architect isn’t sure of it either.
The only reason I use felt under copper is to soften the rough spots a bit. It keeps getting spec’d under steel, but I have many steel roofs over wood deck too. Never a leak. With metal, it will always come down to the weakest link; workmanship.