To verify a payment immediately and without having to download the whole blockchain, you can use the Online Wallet and the mobile app (phones and tablets).

These options are "light" as they do not download the entire Blockchain and allow you to do all of the following:

Create new accounts
receive money
send money
verify that a payment has been received on your account

The only thing you can't do is mine.

http://web.ultrapoint.org/

https://www.ultrapoint.org/android-app.html

https://www.ultrapoint.org/mining.html