BIP-110 backers debate changing the minority chain’s proof-of-work after Bitcoin’s massive difficulty stalls it.

Bitcoin splits at block 961632 as Antpool and Roughnecks mine rival blocks, leaving the BIP-110 chain stalled, at least for now.

BIP-110 is a proposed one-year change that limits non-financial data on Bitcoin and has sparked a debate over how Bitcoin's block space should be used.