An interesting preliminary observation from the Merge Mining Monitor, 20 stale blocks in 20 hours produced by Foundry on 11/12 September 2025. An event that cost them dearly, at least ~46.9 BTC lost in fees.

Merge Mining Monitor

Bitcoin Network Operations Collective

Introducing the Merge Mining Monitor

Foundry produced a very high number of stale blocks on 11/12th September 2025 as recorded in the records of RSK and Fractal Bitcoin: Merge Mining M...

Introducing the Merge Mining Monitor, another tool in service of the Bitcoin monitoring mission. Merge mining lets child chains ride on Bitcoin's PoW, preserving the parent headers miners hashed. Bitcoin keeps no durable record of valid blocks it later discards (stales/orphans). Merge-mined chains do. The monitor turns that merge-mining evidence into a browsable record of who mined each Bitcoin block, which child chains rode along, and which discarded blocks survived in child-chain history. The current dataset recovers 2,200+ stale blocks back to 2011, when Namecoin first brought merge mining to Bitcoin.

Merge Mining Monitor

Introducing the Merge Mining Monitor, another tool in service of the Bitcoin monitoring mission. Merge mining lets child chains ride on Bitcoin's PoW, preserving the parent headers miners hashed. Bitcoin keeps no durable record of valid blocks it later discards (stales/orphans). Merge-mined chains do. The monitor turns that merge-mining evidence into a browsable record of who mined each Bitcoin block, which child chains rode along, and which discarded blocks survived in child-chain history. The current dataset recovers 2,200+ stale blocks back to 2011, when Namecoin first brought merge mining to Bitcoin.

Merge Mining Monitor

This looks really fucking rad from Block, h/t @npub1kuy0...kdj8 & @moneyball & @Max

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Fable 5.. probably at least 80% of my sessions are “safety measure” downgraded within the first few prompts Guess I have no reason for “extra usage” come June 22nd

My blockclock has been offline for about a week (due to power outage and didn’t reconnect to the network), and it has been kinda liberating TBH