Calculating dollar value for taxes

I'm trying to figure out the dollar value of thousands of transactions I've made, like trades, mining, and rewards from master nodes. I need this info in CAD for my capital gains calculations. Is there any online service or database where I can get the dollar values for BTC and some altcoins in Canadian Dollars? Appreciate any help!

You can use cointracking.info e.g - they support several FIAT currencies. like: USD, GBP, EUR, CAD, AUD, NZD ... You can try it for free (First 200 Trades are free) and check the whole functionality. You just have to register your email (no ID or other Information). Iam happy with that online tool.

Now that I've had a chance to use cointracking.info all night, I realize that what I need is an API when given the date/time, and a coin, it will return the dollar value at the date/time. Does anyone know where I could get the historical dollar value of crypto coins through an API?  Thankyou

Damn.Now I realize what pain in the a$$ is to actually pay all the taxes for your crypto revenue+capital gains. Maybe we need crypto tax accountants that work specifically in the crypto niche.