BTS – Proof [Anthology Album | Standard Edition]BYIT KPOP Customer Guide For pre order items, please check the estimated shipping date before purchasing. Due to the nature of entertainment merchandise, early sell outs may occur. (If supply sells out before the estimated shipping date, your order may be canceled and refunded.) We will do our best to ship your order as quickly as possible. Important for Official Merchandise As these are official products, items cannot be resold once opened. Upon