[tenryuu]

Have you deciphered the metadata that is associated with the url? It is odd that we are looking at a paragraph of metadata on a url, however a manual check in is six alphanumeric characters with the Victorian government's system.

We know that none of this data ever changes, these sheets are printed once and are not actively replaced

[dbaupp]

Yeah, the NSW ones contain a base64-encoded JSON blob storing: the id of a business (a short numeric string), the business name (shown in the app even during an offline check-in) and the business address.

I haven’t investigated the Victorian ones deeply, but I would imagine that the name is only used as a confirmation for the user, and a minimal or manual check-in requires only the ID.