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A comment on Ask HN: What are real-life useful use-cases for blockchain (not currencies)?. Parent comment

Re:Ask HN: What are real-life useful use-cases for blockchai... by BMSmnqXAE4yfe1 on Sunday October 25, 2020 @04:08AM (#24884638)
Timestamping existed long before blockchains. You can just push the image to github, there is no way to change the push timestamp.
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