Starting on May 3, 2016, you can check the status of your Green Card Lottery (DV-2017 Program) submission by visiting the official site:
2017 Entrant Status Check
DV-2017 Entrants may enter their confirmation information through the link above starting at noon (EDT) on May 3, 2016. The DV-2017 registration period opens on October 1, 2015, and closes on November 3, 2015. DV-2017 Entrants should keep their confirmation number until at least September 30, 2017.
2016 Entrant Status Check
DV-2016 Entrants (those who entered the DV lottery between October 1, 2014 and November 4, 2014) have until September 30, 2016 to check the status of their entry through the link. The DV-2016 registration period was from October 1, 2014, until November 4, 2014.