Bitcoin’s BIP-110-enforcing branch stalled at block 961,633 on Sunday after producing only two blocks, while the non-enforcing chain reached block 961,721, widening the gap to 88 blocks, according to a BIP-110 monitor updated at 10:19 am UTC. The latest block on the enforcing chain was mined about 12 hours earlier, the monitor said. Ocean records indicate that the pseudonymous mining group Roughnecks mined the first two blocks using Ocean’s Decentralized Alternative Templates for Universal Mining (DATUM) protocol. The divergence began after BIP-110 entered mandatory signaling at block 961,632 on Saturday. Only 51 of the preceding 2,016 blocks, or 2.53%, signaled support. Under the protocol, nodes that enforce BIP-110 reject blocks that do not signal via version bit 4, while standard Bitcoin nodes accept both signaling and non‑signaling blocks. Mandatory signaling is scheduled to continue through block 963,647. The enforcing branch must complete the remaining portion of the 2,016‑block adjustment period before its difficulty can adjust, which has slowed its progress without additional hashpower.

Bitcoin advocates have expressed concerns. Michael Saylor, executive chairman of Strategy, said he supports the proposal’s objectives but warned that its approach could conflict with Bitcoin’s neutral rules and consensus. Adam Back, CEO of Blockstream, cautioned that the consensus-level change might harm Bitcoin’s credibility and could render certain unspent transaction outputs unspendable.