Bitcoin PIPEs v2. - Michel Abdalla; Brent Carmer; Muhammed El Gebali; Handan Kilinc-Alper; Mikhail Komarov; Yaroslav Rebenko; Lev Soukhanov; Erkan Tairi; Elena Tatuzova; Patrick Towa (IACR Cryptol. ePrint Arch., 2026)