As was suggested in the other thread you started about it, these are ink caps, coprinus. Corpinus stems from "kopros" = poop in greek. It is very likely that these were growing on dog faeces.
You should not eat any wild picked mushrooms if you don't know what you are doing. You seem to not have much knowledge about wild mushrooms, so I suggest that you take at least two to three years learning about mushrooms in your area before you indulge in any.
I am very serious about the two to three years. In order to make a positive identification of a mushroom you might like, you also must be able to make a negative identification of any potential lookalikes. You need to read books and practice just spotting mushrooms. No eating the first years until you are able to make both positive and negative identifications.
In this case, in order to be able to recognize psilocybe mushrooms, you must be able to recognize coprinus mushrooms, and a lot more than these. The most important lookalike that you should recognize is galerina autumnalis (or galerina marginalis). Some lookalikes will taste nice, some will make you vomit or feel very miserable for a day, but some, like the galerinas, are deadly.
The first thing that you should learn about mushroom identification is to make spore prints. Simply place a fresh mushroom cap on a piece of paper and after a couple of hours the mushroom cap will have deposited its spores in a radial pattern. The color of the spores will tell you some basic things about the type of mushroom. Ink caps will produce a black spore print. Psilocybes will produce a dark purple spore print.
Happy learning!
PS if you want to eat psilocybe mushrooms, just grow some. It is fun!