https://www.btcforkmonitor.info/
What is this website? This website is for warning users if the Bitcoin blockchain has experienced a chain split due to the various fork proposals such as Segwit2x and BIP 148 UASF. If a chain split is detected, there will be a red warning banner at the top of the page stating that a chain split has been detected. Once a chain split has been detected, the status for each node will update with the block height of the most recent split from other nodes and the hash of the block at that height. The site will also warn if a node has fallen behind one of the other nodes and has not split onto a different chain from other node. It will also warn if one of the nodes has recently experienced a blockchain reorganization.
How does this website work? The website runs a node for each of the nodes displayed above. A process runs every ten seconds to check to see if each of the nodes has diverged from each other. To avoid triggering the warning in cases of orphaned blocks and latency, the site will only warn if a chain split of more than two blocks is detected.
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