Stacks will open enrolment for its first Bitcoin staking product on 10 September, and one of Asia’s largest institutional staking firms has signed up to take part.
HashKey Cloud, the staking arm of Hong Kong-listed HashKey Group, announced on Thursday that it is joining Stacks as a launch partner for what the network calls self-custodial Bitcoin Staking. The firm has HKD 29 billion staked across more than 40 blockchain networks.
The product is called the Genesis Bond. Enrolment opens at Bitcoin block 966,350, with the first rewards projected for 17 September.
The pitch is straightforward: earn Bitcoin yield without your Bitcoin ever leaving Bitcoin.
How it works without moving the coins
Most ways of earning yield on Bitcoin involve giving something up. You wrap it into a token on another chain, send it across a bridge, or hand it to a lender who holds the keys. Each of those adds a point of failure Bitcoin was designed to avoid.
Stacks does it differently. A holder locks their BTC on the Bitcoin base layer using a timelock script, which means the coins never move and the holder keeps their own keys. They then pair that locked Bitcoin with a smaller amount of STX, the Stacks token, to form what the protocol calls a bond.
The yield comes from Bitcoin miners. Under Proof of Transfer, the consensus mechanism Stacks runs on, miners spend BTC to compete for the right to produce Stacks blocks. That spent Bitcoin gets distributed to the people who have committed STX.
So the reward is paid in real Bitcoin, from an on-chain source that anyone can inspect, rather than from a lending desk or a yield product with a counterparty behind it.
The plumbing took a year to build
None of this appeared overnight.
The technical foundation arrived on 30 July, when Stacks activated the PoX-5 hard fork at Bitcoin block 960,230. The upgrade passed its governance vote with more than 99.99% approval, was codified through two improvement proposals, and completed without interrupting block production. Signers, node operators and exchange partners including Binance migrated ahead of time.
Roughly 392 million STX were restaked ahead of the first reward cycle.
Institutional groundwork ran alongside it. Stacks integrated with Fireblocks in June to handle custody requirements. UTXO Management, the asset management arm of Bitcoin treasury firm Nakamoto Inc., became the first institution to commit BTC in late May, and will participate in the Genesis Bond alongside HashKey Cloud.
The launch date slipped. The Genesis Bond was originally expected in late August before the team settled on 10 September, tied to a specific Bitcoin block.
The first phase is deliberately small
Capacity in the opening round is capped at somewhere between 100 and 200 BTC.
That is a modest figure against the roughly $1.3 trillion in Bitcoin sitting idle worldwide, and the constraint appears intentional. A small pool of sophisticated participants can stress-test the mechanism and provide operational feedback before it opens more widely.
Only about 10% of total bonding capacity has been reserved for ecosystem pools run by experienced STX stackers, with the bootstrap period overseen by the Stacks Endowment.
Demand has already outstripped that allocation. StackingDAO, one of the pools, has fully allocated its Bitcoin staking capacity ahead of the launch. It is also introducing stBTC, a liquid staking token that lets users auto-compound their sBTC rewards while holding a transferable position they can use across Stacks DeFi applications.
HashKey is also securing the bridge
The second half of the announcement matters as much as the first, and it concerns sBTC rather than the bond.
sBTC is the protocol that moves Bitcoin between the base layer and the Stacks network. It is backed one-to-one and secured by a decentralised group of signers, who require 70% consensus to approve any deposit or withdrawal. No single custodian or bridge operator holds the keys.
HashKey Cloud is joining that signer set, bringing node operation experience dating back to 2018.
That distinction is worth drawing out. Bridge failures have been among the most expensive events in crypto, precisely because they tend to concentrate control in a small number of hands. A signer model requiring supermajority agreement spreads that risk, and adding a regulated institutional operator to the group strengthens it further.
“Institutions want their Bitcoin to earn Bitcoin without giving up custody or moving it off the base layer,” said Muneeb Ali, founder of Stacks.
What to watch after 10 September
Three things will indicate whether this works.
How much BTC actually enrols, against the 100 to 200 BTC cap. Whether the first rewards land on 17 September as projected. And how quickly capacity expands beyond the initial institutional group to ordinary holders.
Stacks reported cumulative users above 1.6 million in its second-quarter report, up 8% on the quarter, with new wallets rising from 72,000 to 110,000. An earlier version of this concept, Dual Stacking with sBTC, attracted over $100 million in participation.
The broader question is whether Bitcoin holders want yield at all. A large share of them hold precisely because Bitcoin does nothing, and treat that as the feature rather than the limitation. Stacks is betting that institutions with reporting obligations and return targets see it differently.
The Genesis Bond will produce the first real data on that.
FAQ
Does my Bitcoin leave the Bitcoin blockchain?
No. BTC is timelocked on layer 1 under the holder’s own keys. There is no wrapping, bridging or third-party custody.
Where does the yield come from?
Miners spend BTC to compete for the right to produce Stacks blocks, and that Bitcoin is distributed to participants who have committed STX. Rewards are paid in Bitcoin.
When does it open?
Enrolment starts 10 September at Bitcoin block 966,350, with first rewards projected for 17 September. The initial phase is capped at roughly 100 to 200 BTC for institutional participants.
Disclaimer: This article is for informational purposes only and does not constitute financial advice. Cryptocurrency investments carry significant risk. Always conduct your own research before making any investment decisions.
