Cliff Burton, Metallica's bassist from 1982 to 1986, when he was alive, told Kirk that he had jumped from the 11th floor and did not die. The guitarist could not believe it. However, Lars and James said that they saw it happening. Not only that, all of Metallica's fans confirmed it.
That is how Hugo Pinto explained blockchain to Campaign's Breakfast briefing on blockchain attendees. The decentralised ledger was the theme of the event exploring how the new technology will impact marketing and advertising. He also demystified some ideas such as only one blockchain, it being cryptocurrency and immutable. Using his initial example he explained that if enough nodes in the blockchain are "convinced" that something happened, then it gets verified. Practically, something very difficult to achieve, but not impossible.
With this basic understanding, we learned from the speakers how blockchain is being implemented beyond fintech: