First Known Stratum V2 Job Declaration Block Is Mined on Bitcoin Mainnet
GoMining and the DMND pool mined Bitcoin block 955,318 using Stratum V2 Job Declaration, the first known production block in which the miner rather than the pool constructed and declared the transaction template. The milestone put a long-discussed mining-decentralization mechanism into live mainnet use.
On June 25, 2026, GoMining and the DMND mining pool mined Bitcoin block 955,318 using Stratum V2’s Job Declaration mechanism. GoMining constructed the block template and selected the transactions, then declared that template to DMND for validation and mining. It was the first known Bitcoin block produced through Job Declaration in a live production environment.
For most pooled Bitcoin mining, the pool operator—not the individual miner contributing hashpower—constructs the block template and therefore chooses which transactions the mining work attempts to confirm. That arrangement concentrates an important part of Bitcoin’s censorship surface in a relatively small number of mining pools even when the physical hashrate itself is geographically or organizationally distributed.
Job Declaration changes that division of labor. Under the Stratum V2 architecture, a miner can build its own candidate block template and submit it to a compatible pool rather than accepting the pool’s transaction selection. The pool can still validate the work and coordinate payouts, but it no longer needs to control which transactions the miner attempts to include.
Block 955,318 therefore mattered for more than software compatibility. It demonstrated on Bitcoin mainnet that pooled mining and miner-controlled block construction could operate together in production. Adoption was still extremely limited in June 2026 and the milestone did not instantly decentralize transaction selection across the network. Its historical importance lies in turning a long-discussed censorship-resistance mechanism into an actual mined Bitcoin block.