I've implemented something like this before, instead of using jsonstore, I'm using goo.gl's api and adding a hash.
https://chhota.ga - it even works on custom domains with just one line of js.
https://chhota.ga - it even works on custom domains with just one line of js.
By the way if you have any ideas you can check my repo and contribute, we can work together to make it better.
I think we are almost at same age