Nowadays, a lot of my friends are playing Yu-Gi-Oh again. I don’t play myself but when I watch them play, I get hit with a sense of nostalgia. One card always makes me smile – the Blue Eyes White Dragon.
In the TV show, there were only 3 of these cards in existence (making it one of the rarest). In the real world, it was one of the most common cards in existence. When I traded a friend of mine for this card, there was no need for proof of authenticity at all.
But let’s suppose that there was only one of these in existence. How would you know that I didn’t print 100 of these cards and simply trade you a counterfeit card?
We could use a ledger to track our transaction. But we would need a 3rd party (let’s say Konami) to keep track and ensure that no one can trade duplicated cards. But, we are introducing a middle man! We will have to go through Konami for all transactions. But how can we even really be sure that Konami isn’t tampering with this ledger for its own benefit?
Here’s an earth-shattering idea: How about everyone keeps a copy of the ledger? There are millions of Yu-Gi-Oh enthusiasts in the world and when I receive this rare Blue Eyes White Dragon, everyone gets notified that I have this card.