Is hair really compostable?

The book that came with my composter says it is.

Every book, web-site, and article I have ever read about composting says it is.

Yet there it sits.
Intertwined in our beautiful composted soil.
Totally recognizable.
Totally unchanged.
Totally still hair.

I guess the real question I should be asking is How long does it take for hair to compost?

Apparently longer than all the other items we put into our composter.

Now I am faced with the question of what to do with this:

This is the bag that , much to my hubby's disgust, sits under our bathroom sink.

For the past couple of years now I have used this same bag to collect compostable material such as dead leafs, biodegradable wooden tooth picks and dental picks, dryer lint, and hair.
Lots and lots of hair.
Between my daughter and I there is never a shortage of "compostable" hair.

So now the question is what to do with that bag of compostable hair.

Do we keep composting it in our composter and ignore the strands of hair decorating the base of our tulips?

Do we put it in our compost pile and just keep piling debris over it?  (the out of sight out of mind approach)

Or do I throw it in the green bin for the professional compost facility to compost it?

I am not sure what to do with it?

While perusing the internet for my answer I came across this great link about composting.

How to make compost

Even though it says everything that I have read before I like the simplicity of the layout and bullet point instructions. It makes finding what you are looking for easy.

But alas, it does not answer my burning question: How long does it take for hair to compost?