A playground page that fetches an assumeUTXO snapshot in the browser over WebTorrent, hashes it as the bytes arrive, and compares the sha256 with the one on the assumeUTXO record.
Live: https://play-grounds.github.io/webtorrent/
First cut is wired to one file, the txbt4 fork-point snapshot at height 150307. The torrent facts live in a JSON-LD island on the page using Torrent Schema terms.