i've try alpha platform, and how to check my ticket when i purchase some tickets? and, how to use the ticket after purchase it?
In future the ticket barcodes can be scanned, maybe a password or ID check also is associated with it. The event promoters will have different options on how they wish their tickets to be validated. Also tickets can be resold and refunded according to customizeable Smart Ticket rules.
But that still doesnt fix the reselling. Despite reputation system and pegging price of tickets, if just barcode will be used, than you can still print and sell the ticket for 200% profit. You wrote that it will be up to event promoters which system to use, but i think black market problem should be fought form the start of the chain and that will be your platform.
Actually, I wonder if reselling at huge profit can be solved at all. One could simply sidestep the blockchain restriction by putting an advertisement for highly sought after tickets on a 3rd party site asking for additional payment (cash, bank, Paypal, Bitcoin, etc.) before starting the EventChain transaction.
You could attack the problem from another angle, limiting the number of tickets per person, but one can work around that through fake accounts.
Hell, you could ask for a copy of a passport and resellers would start a "photo of your passport for cash" business.
Truthfully, it will be very hard to stop scalper, but if you can make their job a little more labor intensive then it could possibly have some positive effects. Currently a scalper can see a big act ticket and automatically buy 1000 tickets on one order. however, if said scalper has to provide identification for each of the 1000 ticket, the labor involved might reduce their acquisition from a 1000 to 100.