Ark Invest and 21Shares will disclose the bitcoin reserves of their ARK 21Shares Bitcoin ETF (ARKB) to increase transparency, CoinDesk reported. The two asset management companies are the second issuer of spot Bitcoin ETFs after Bitwise. Ark Invest and 21Shares have integrated Chainlink's Proof of Reserve platform to verify holdings data, thereby providing greater transparency for their ARK 21Shares Bitcoin ETF (ARKB). "This collaboration allows us to provide ARKB investors with unprecedented insight and security into their holdings," said Ophelia Snyder, co-founder and president of 21Shares. The move comes after Bitwise disclosed the digital wallet address of its Bitwise Bitcoin ETF (BITB) in January this year to show its holdings. This effort to increase transparency has been widely praised by industry experts. Ark/21Shares will now become the second issuer to put holdings data on-chain. As of the end of Monday, ARKB has accumulated 33,274 bitcoins and managed assets of more than $1.8 billion, ranking third among issuers. Only Fidelity’s Wise Origin Bitcoin Fund (FBTC) and BlackRock’s iShares Bitcoin Trust (IBIT) attracted more money.