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Re:Ask HN: What are real-life useful use-cases for blockchai... by pintxo on Saturday October 24, 2020 @04:31PM (#24881761)
> Doesn't protect against the owner saying you didn't send the photo, or that it didn't arrive in time, ...

The owner could be required to send back a confirmation.

But I agree, a trusted hash/timestamp service might provide better usability.

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