Sure: https://www.youtube.com/watch?v=zIbUSaZBJgU https://www.youtube.com/watch?v=zIbUSaZBJgU But there are also some online wallets that already implemented i

Sure: https://www.youtube.com/watch?v=zIbUSaZBJgU https://www.youtube.com/watch?v=zIbUSaZBJgU But there are also some online wallets that already implemented it: https://greenaddress.it/en/ https://greenaddress.it/en/ https://www.bitgo.com/ https://www.bitgo.com/ https://www.bitalo.com/ https://www.bitalo.com/ (this one is also at the same time something like localbitcoins.com)