Check out Stacks (https://stacks.co https://stacks.co), enables smart contracts on top of Bitcoin through Proof-of-Transfer consensus. Founded by YC alums and l

Check out Stacks (https://stacks.co https://stacks.co), enables smart contracts on top of Bitcoin through Proof-of-Transfer consensus. Founded by YC alums and launched this January after many years of R&D. Disclaimer: I'm involved.