Single QR on the entry band → the live schedule. A health check emails the crew when the main site stops answering, and one edit repoints every band at a lightweight static copy.
EQR sends a HEAD request to the festival's schedule site on the interval set on the code and records every result. A failed check sends an alert email to the address on the code — EQR does not swap the destination by itself. The crew makes that call in the panel, repointing the band at a hyper-light text schedule hosted on content.eqr.link, light enough to open on a weak connection deep in a crowd.
Free tier includes 1 standard QR code. Upgrade to the paid Eternal tier for blockchain permanence and the recovery key.