What is "Universal Hash Time" which is presented by Jeff Coleman at DEVCON1?
- What is the purpose?
- What is the problem it will solve?
- What is the solution?
- How does it work?
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Universal Hash Time is a proof of existence service that you can build on top of a blockchain.
To further answer your questions:
The principles are very similar to linked timestamping, with the added benefit of publishing the result on a data structure that serves as a digital trust platform (i.e. blockchain) instead of relying on a trusted third party (newspaper in the wikipedia example)