I love this project and I wish you all the best. Whenever you have a working prototype start by contacting small local venues like pubs and social places for starting rock bands or college sports so you can test the app with real use. Tell them they could use both physical and crypto tickets while you polish the app. You'll need a wallet and a scanner so people can hold their tickets in their phone while venues can scan the tickets and allow entrance but always give them the chance to fall back to physical in case not everybody is on board with the new app.
And you know what, all types of entrance tickets, parking tickets, attendance, conferences, etc can be used with your wallet/scanner. NFC also comes to mind for proximity scanning even in the darkness.
Keep us posted.