The facilitator's differentiator: a resource's ownership binding, once proven by a real settlement, is a permanent latch — not a badge that can flip back off. Once proven, a later settlement from a different address can't displace it.
All 8 of the demo seller's own resources — not just one. Each has already settled at least once; most are settled-but-not-yet-reverified, since the facilitator only reverifies ownership as a fire-and-forget side effect of a fresh settlement (see "Verify now" below for what that means for the check you're about to run).
This resource isn't in the catalog yet.
This page can't verify anything — it can only check. Clicking "Verify now" runs a real, live comparison and shows you the real result, but it has no ability to mark a resource "Verified" in the catalog. Only the facilitator's own background process can do that, on its own schedule, after a real settlement.
Checking Motivational quote of the day: the playground performs the same check the facilitator runs — fetching this resource's own 402 challenge and comparing the payTo it names against the bound address already on file.
The real facilitator also pins DNS and blocks private/internal addresses before fetching an arbitrary seller URL; this demo check skips that hardening since the resource you can pick above is always one of a fixed, known-safe set — never an address you supply.
Replicates steps 1 and 2 above manually: an unpaid GET against the seller, then decoding the PAYMENT-REQUIRED header by hand.
curl -sD - https://vellar-seller-demo.onrender.com/quote -o /dev/null \ | grep -i '^payment-required:' \ | cut -d' ' -f2 \ | tr -d '\r' \ | base64 -d # Expect: HTTP 402, and a decoded JSON challenge whose accepts[0].payTo # is the address this station compares against the catalog's bound # address for the same resource.