Mr. Tact wrote on Dec 2, 2021, 13:38:
Bodolza wrote on Dec 2, 2021, 12:47:Please explain, useful in what way?
This seems like an actual useful use of blockchain
I don't know about this particular case, but the bitcoin blockchain is being used today for verification purposes. For example OpenTimestamps.org
for verifying timestamps for documents.
This is possible since the whole history of the chain is public and can be trusted to be tamper-proof.