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I love the fact that this exists, however my major concern is that because this is self-hosted, in the event of a dispute, the other party can claim that I forged the document. In such a scenario, how would I ever prove that I didn't?

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When self-hosting it it's possible use merkle tree to ensure the documents integrity (similar to how git works with its commit hashes). So to forge one document it will require to change all document hashes after the disputed document making it impossible to cheat by the organization that is self-hosting it. This will be added into the project soon.

https://en.wikipedia.org/wiki/Merkle_tree

Alternatively I'm thinking about adding a third party AWS QLDB integration - QLDB allows to maintain an immutable, cryptographically verifiable log of data changes.

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