When Two Miners Clash, One Pool Cashes: Foundry's Six-Block Streak Orphans the Competition

Bitcoin's mining centralization anxiety just got a live, on-chain demo via a brief but spicy blockchain spat. Playing the role of the network's heavyweight champ was Foundry USA, the reigning hash-rate king.

The blockchain briefly suffered an identity crisis early this week. Foundry and AntPool each mined valid blocks a mere 12 seconds apart, triggering a classic chain split. It was a digital fork in the road, with some nodes picking one path and others stubbornly backing the rival.

The duel escalated. ViaBTC added a block to AntPool's chain, while Foundry fortified its own, creating two parallel realities each two blocks long—a true multiverse of monetary misery.

Then, Foundry decided to end the debate with sheer computational brute force. It proceeded to mine blocks 941,883 through 941,886 in a relentless, consecutive streak, making its chain the undeniable, longer, and therefore correct version. The network dutifully reorganized to follow Foundry's lead, just as Satoshi's code ordained.

The fallout? The blocks mined by AntPool and ViaBTC were unceremoniously orphaned—vaporized from the canonical ledger. Those miners earned exactly zero satoshis for their perfectly valid work. Consider it the blockchain's version of "nice proof-of-work, but it doesn't count."

This little drama was a rare 2-block reorganization. It's the most transparent on-chain billboard yet advertising that hash-rate is consolidating into fewer wallets as the post-halving squeeze tightens its grip.

Fear not, the transactions stuck in the orphaned blocks weren't lost; they were simply ejected back into the mempool purgatory to await inclusion in a future, more fortunate block. Your ordinals are fine, for now.

While a 2-block reorg is a minor hiccup that doesn't threaten Bitcoin's security—the network swallowed it like a champ—it spotlights a concerning trend. When fewer pools control more hash-power, the odds of one pool going on a hot streak increase. So does the likelihood of these competing chains when two giants stumble upon blocks nearly simultaneously.

The context for this consolidation? Mining difficulty just executed a 7.76% faceplant on Saturday, the second-largest negative adjustment this year. Total network hash-rate has retreated to roughly 920 EH/s from 2025's dizzying 1 zetahash peak.

With bitcoin meandering near $70,000—still well south of the estimated $88,000 average cost to mine one—the smaller and mid-tier miners are getting squeezed out. Every operator that unplugs their rigs further funnels the remaining hash-power into the hands of fewer, larger pools. The rich get richer, and occasionally, they get to casually redact the last couple entries in the world's most expensive ledger.