Kim Eana (IU's lyricist), Park Yohan (IU's dancer) and Hanteo manager have टिप्पणी जोड़ा गया हे on her चित्र (I'm way too lazy to scroll all the टिप्पणियाँ looking for और people I know.)

She is also following several people, like Coordi Noh, that require approval to be followed.

IU's confirmed Instagram account: link

[UPDATE] IU's former producer, Cho Young Cheol, confirmed the account on his twitter via his Instagram: link and आई यू replied.

Translation here: link

चित्र caption translation:
ee ji geum (wordplay of ‘Lee Jieun’, meaning ‘this now’) Instagram. Why does everyone add # at the back?

trans source: link

चित्र source: link