I'm pretty sure some bands were doing this a decade ago.
Even UEFA, among the most corrupt organizations in the world, does this for football tickets, you can buy 2 tickets and can change one name exactly once or sell them back to the organization.
At this point if you allow scalpers it's a decision not a technical problem.
Unless you're forced to buy exactly two tickets [0], I don't see how that prevents scalpers? Pay people 100% of their purchasing cost and -IDK- 5% of the scalping profit to use their name to purchase the ticket and hand over the creds to do the ticket owner reassignment.
[0] In which case, I suppose it's a huge "fuck you" to people who aren't particularly social.
2 tickets: you can either sell them both back, OR change ONLY one name once. This means you have the option of buying two tickets up front, before you lock-in your companion.
It works well, I’ve experienced this for festival tickets.
It doesn't have to be perfect to be effective.
It does not prevent scalpers altogether, but it makes it harder and less profitable.
Generally, people do not want to go to an event alone, you'd go with a friend, partner, spouse, whatever.
So the scalper's profitability calculation goes from "buy 10 tickets for 100$ and sell them at 10x price to anyone" to "buy 2 tickets and sell 1 of them at less than 10x to people who want to attend the event alone". The profitability went from 10000 to less than 80.