Every other explorer asks you to trust its index. Here the green check is computed in your own browser — the signature, the content hashes, the name binding — against a bridge you can point anywhere.
The default capsule adds 1 to each byte, so hello becomes ifmmp.
Your browser re-derives the signed bytes, checks the provider's ed25519 signature, and binds the output and your input to their CIDs.
A name → content binding is a signed record. Your browser checks the author actually signed it (the Nostr model) — the bridge can map a name to content, but cannot forge whose name it is.