Grayscale cites security concerns for withholding on-chain proof of reserves Post author:MiamiCrypto Post published:November 19, 2022 Post category:Bitcoin / bitcoin reserves / coinbase custody / crypto securities / digital asset investment / ftx / GBTC / Grayscale / grayscale bitcoin / on-chain / Proof of Reserves / Twitter / wallet addresses Grayscale shared a letter from Coinbase Custody attesting that each of Grayscale’s crypto products is fully backed, but stopped short of providing the wallet addresses. You Might Also Like Grayscale rolls out Bitcoin Miners ETF, taps into global Bitcoin mining ecosystem January 30, 2025 Bitfinex and Tether Donate 25 BTC to Aid El Salvadoran Families Hit by Gang Violence April 14, 2022 BlackRock’s IBIT purchases $65M in Bitcoin October 28, 2025