PS - I just went to App Store and cannot find your SEATS App for iOS. Found the website seats-app. I propose that we use the PHP library PHPQRcode generator to generate the codes and merge them into an overall PNG file.
If you look at [login to view URL] you will see that the library can generate a QR code.
I would want you to be specific about the QR code you want generated - I guess
"[login to view URL]" where N is the number from 1 to 486??
And a PNG file with your explanation text with a blank section for the QR code.
My script would take your input PNG (ticket), generate and add in the QR code, and write 486 PNG files out.
Assuming you have php installed or do you need that too??
Let me know. Looks interesting
Mark