Each unit's QR carries its own 3-check limit. Every check webhooks brand security with the country and device class; once the limit is used the code stops resolving, so a cloned label dead-ends.
Counterfeit producers clone the printed QR, and a clone spends the same code the genuine buyer has. Give every unit a code with a three-check limit: honest buyers verify, the clone's extra scans burn what is left, and from then on the code answers with EQR's limit notice — the tell that the label has been copied. Every check that resolves fires a signed webhook into the brand's security stack with the time, the country and the device class.
Free tier includes 1 standard QR code. Upgrade to the paid Eternal tier for blockchain permanence and the recovery key.