300 billboards, 300 QRs — each scan hits the advertiser's site and webhooks the ad agency's CRM with the panel ID, time, and rough geo.
Each panel gets a uniquely tagged QR. EQR redirects in <200ms while firing a structured webhook into the agency's measurement stack — CPA/CPC pricing on outdoor advertising finally becomes possible.
Free tier includes 1 standard QR code. Upgrade to the paid Eternal tier for blockchain permanence and the recovery key.