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series of events, by anchoring data to the blockchain and other sources. this allows anyone to prove the data existed at a point in time and has not been modified. the group will publish and formalize the chainpoint specification as a stable reference, maintain a test suite, and take feedback and use cases
more about chainpoint, its history, and goals, on our recent blog post announcing chainpoint . this group invites participants who are actively developing and deploying proof-of-existence, timestamping, and data integrity solutions, who are skilled in blockchain technologies, and who can work on use cases...
https://www.w3.org/community/chainpoint/