HashKey Cloud and Xverse have joined Stacks’ self-custodial Bitcoin staking rollout through separate institutional and retail channels. HashKey Cloud will participate in the inaugural institutional Genesis Bond and operate as an sBTC signer, while Xverse version 2.9 lets retail users access pooled positions using sBTC and STX. Stacks expects the Genesis Bond to begin around Sept. 10 near Bitcoin block 966,350 during reward cycle 143, although the precise timing, capacity and allocations remain subject to the block and operational conditions. The protocol targets roughly 3% annualized rewards, generally distributed in sBTC about every two weeks, but returns are not guaranteed and depend on miner commitments, total deposits and network conditions. Stacks’ Proof of Transfer system does not change Bitcoin’s proof-of-work consensus: institutional Protocol Bonds can pair Bitcoin timelocked on the base layer with STX locked on Stacks, while Xverse’s retail flow uses sBTC backed one-for-one by Bitcoin through the signer system. Initial institutional access includes 21Shares and UTXO Management, while Xverse provides retail access without a large standalone minimum.