> For the complete documentation index, see [llms.txt](https://docs.bvm.network/bvm/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bvm.network/bvm/bitcoin-heartbeats/chain-heartbeats.md). # Chain heartbeats Chain heartbeats provide transparent and verifiable insights into new scaling technologies — such as rollups and sidechains.