Probably this is what you are looking for. It is more or less the same concept than your own response, but scripted in order to make it really silly and simple.
There is a script called Snap-Share that was ment to feel what you are looking for.
What it does exactly? well...
0) Launch it:
1)it takes a picture
2)upload it, and
3) copy the link in your clipboard. All in one move.
See Snap-share working:
In this video you can see how to install the program and how it works :)
Click the image to go to the video!
How to install it:
sudo apt-get install xsel scrot xclip
and then paste this:
mkdir -p ~/.snap-share-install && cd ~/.snap-share-install && wget https://github.com/rhoconlinux/snap-share/archive/master.zip && unzip master.zip && rm master.zip && cd snap-share-master/ && chmod +x install.sh && sh install.sh && cd ~ && clear
Then run it with your favourite launcher. The application is called snap-share. :)
Hope it is useful.
Note. this was made mainly for personal use, it is an alpha version. I don't why but randomly from time to time (not allways) the link is mixed with some other things in the clipboard if you take more than three snaps, I don't know why or how to solve it yet. Any help appreciated.