Bloodborne, which is being developed by Software with the help of Sony Japan Studio, is a game designed on the same mold as Demon's Souls and Dark Souls.
February 5th falls on Thursday, which would be an unusual days of the week to release a game in the Western Territories. It is therefore unlikely that this date is accurate for North-America. However the previous Tuesday February 3 would be very likely with the day after for Europe.
The release of Bloodborne is also very close to the release date of The Order: 1886, another hugely awaited exclusive PS4 game that will be released on February 20, 2015. All in all, the month of February may be quite busy and interesting for PlayStation 4 owners.