Not sure if this is the one, but it looks like they rebranded or moved to "The Cardano Foundation". Their site, adacoin.com, now links to cardanofoundation.org. Honestly never heard of this coin, as it's not even listed on coinmarketcap. I personally don't trust it, so I suggest that you proceed with caution.
Here is plenty of reason more not to trust it:
https://medium.com/@classicether/out-of-the-ether-a-crisis-of-irresponsible-governance-facing-ethereum-classic-a77abdd7a9faThe ICO has to be some kind of record holder in terms of shadiness - they kept it behind closed doors in Japan and held the BTC until they appreciated majorly with no communication in the meantime for months!
ICO price was 0.0025 USD! This was supposed to be a well kept secret until the ambush listing came on Bittrex. It's scam through and trough.