HashKey Cloud will deploy Bitcoin into Stacks as the second institution in the network’s Genesis Bond pilot, Stacks founder Muneeb Ali said on Aug. 27 via X. The Asian infrastructure provider will time-lock BTC on Bitcoin’s base layer while retaining the keys, and pair the position with STX worth roughly 5% of the committed Bitcoin. HashKey’s allocation was not disclosed; total BTC committed is expected to become visible on-chain when the bond begins around Sept. 10. The program targets about 3% annualized yield from BTC committed by Stacks miners, but payouts are variable and depend on STX and miner economics. A roughly six-month, 24-cycle bond would return about 1.44% of locked BTC if the target is achieved. The first bond operates under managed PoX-5 parameters, while a future PoX-6 proposal aims to introduce an algorithmic auction. PoX-5 activated at Bitcoin block 960,230 on July 30. The structure preserves self-custodied BTC principal but adds STX price, miner, and smart-contract risks, including an open medium-severity issue in the bond rollover path.