Re: Nasdaq and blockchain-question

http://www.bloomberg.com/news/articles/2015-07-23/nasdaq-expects-to-be-first-exchange-to-use-bitcoin-technology

Will they be integrating with BTC's blockchain or using their own internal blockchain Im wondering? Anyone have any insight beyond this article?

At this stage, I think they've committed to using colored coins, but in future maybe they'll try their own private blockchain.