What coin are you mining bitcoin or eth?
if its ethereum they have a software wherein you will just put your address then you can see if it's still running I know they have in mobile app, but I have never tried it before its been like 3 years since I have stopped,
https://ethermine.org/ if the hash stops you can see that the 2 lines will go down and never move until you have started the miner
by the way you check in mining section or ask what they are using hope this one helps you.