Stacks · Proof of Transfer simulation

Miners spend real BTC on the Bitcoin chain to bid for the right to produce a Stacks block. Every miner's bid pays out to STX holders who locked their tokens ("Stacking") — win or lose — while sortition weighted by BTC spent picks one miner to earn the STX block reward. Edit parameters, or trigger the Bitcoin-miner censorship attack that once suppressed Stacker yield.
Miners 6 active, bid BTC Bitcoin L1 block-commit txs Sortition VRF weighted by BTC spent STX chain winner mints block 1,000 STX/block PoX boot contract routes BTC to Stackers CENSORSHIP ACTIVE Stackers locked STX 0.000 BTC earned
Blocks produced
0
BTC paid to Stackers
0.000 BTC
STX minted to miners
0
Effective miner competition
6
Parameters — edit me
6
0.08 BTC
1000 STX
0.9/s
Controls

Illustrative simulation. Modeled on SIP-007 Proof of Transfer: miners' BTC bids are paid to Stacking reward addresses whether they win or lose, and one miner is chosen by a BTC-weighted lottery to earn the STX coinbase. The censorship button illustrates the real 2022–24 Bitcoin-miner MEV exploit, where large hashrate could exclude rival commits from blocks it mined — timing and bid sizes here are randomized for visualization, not live onchain data. Part of The Onchain Experiment Atlas.