One Piece started airing at October 1999 and it's still airing.
This opening is called Hope.
You can still watch and download the 3rd version at Google+ https://plus.google.com/101937984568461273189/posts/TXo8cSYRn69
It's really weird they blocked the 3rd version (episode 825 only) and not the other ones. The music is the same. Why didn't they block the other versions, specially when they have way more views?