Short Squeeze is basically the official bi-monthly listings taken from FINRA's site and shows the 1st and 15th of the month shorts. I have stated my opinion that most shorts really don't want to mess with MIMV, too big a potential liability and this Website backs that up.
The OTC Short Report has created heavy debates as to its veracity. Some say it is accurate. Others say the "shorts" are simply trades between two different brokerages and they simply haven't closed the books on trades that day. I agree with the second definition. The info for this site is collected here: