Blockchain search engine for all BTC related coins

[NewalTurim]

Hey people,

In the face of Bitcoin Privat fork coming up...

I think the title already states my question quite clear. Is there a search engine where you have the possibility to really see all your coins on the BTC paper wallet address? Especially without downloading something or using/releasing your private key. After more and more forks coming up, I do not want to end up throwing away free coins - when sweeping my wallet - which I might have received at some point. No matter if they are shitcoins or not...

thanks your input!