Any practical implementation of NIP-03 in the wild? (particularly for Consensus-based record keeping) 🤔

Running an experiment on a tool that might necessitate a robust consensus mechanism among multiple parties.

Think Docusign - Party A initiates a record, and Party B (along with potentially others) is invited to verify and consent to this record. Any update to the initial record does not mutate the original but instead is tracked as part of its historical evolution, requiring renewed consensus from all parties involved.

This mechanism ensures transparency and trust, as each iteration of the record is only valid with the unanimous agreement of all stakeholders, similar to a contract’s terms that evolves over time with each party’s endorsement.

So far, I think NIP-03 could be a strong candidate for such a system, given the immutable timestamping and the decentralized verification process it offers via OpenTimestamps attestations. My query:

- Are there any live, practical applications of NIP-03 that have been implemented in scenarios requiring such consensus and non-mutability? (or any other scenario)

- How might NIP-03 (alongside other NIPs i.e NIP-01/04) be leveraged in a system where every alteration to a record is treated as an append-only transaction, with all previous versions remaining intact and verifiable?