Rotted bark chippings ?

I have spent this wonderful day sorting the garden at last.
I have scooped up old B and Q bark chippings laid 5 years ago on an old concrete path. Mostly dark soil type thing now about 3 inches thick, along with roots from spreading bamboo rizomes that I have discarded. Seems a shame to waste the "compost".
Does anyone know if the resulting compost  is ok to use as a bulk standard compost on my allotment for general veg use ? Can't seem to find an online answer. Am wondering about nitrogen effect and acidity issues.

I bring in bark chippings to use as mulch and find they compost rather quickly on me. Plants are happy but they're not the ones lugging it in 

It's usually me GG! 

High carbon materials like wood chippings contain little nitrogen of their own, so have to 'borrow' it from the surrounding soil to feed the micro-organisms which bring about decomposition.

The nitrogen is returned as the material breaks down, so doesn't actually 'rob' the soil, although it can cause a temporary shortage, especially if present in large amounts.

(What it can't do is 'suck' nitrogen out of the soil if applied as a mulch rather than being dug in.)

If you've added something to enrich the soil prior to the bark chippings, eg fertilizer, manure, compost, etc, then there's enough for the chippings to utilize. They take far less nitrogen than people imagine and definitely return more as compost. I've used the chippings for quite a few years and haven't notice any setbacks; if anything, I've seen my plants produce better.

I saw on some gardening programme or other that they riddled the bark chippings on their paths every few years, using the stuf that went through the riddle as compost and the rest either back onto the path or as a mulch.