Why use that tech - "But, but, but, but it's blockchain!" (I don't have a smiley for beating head against wall.) Sounds like almost all blockchain projects - doesn't solve any of their problems ... but it's blockchain ... fashionable amongst the ignorant. The only practical purpose for blockchain is to gain project funding.
That fact that you can prove to all stakeholders that the data about a triall is complete, hasn't been altered is very powerful when you have many parties and many documents, where you still need to provide proofs in the future.
This solution allows you to prove it on an individual document level, all the way up till dossier or clinical trial level. Meaning you can prove that not a single document has been added, edited or deleted in ten years time for instance.
How about https://blog.smartdec.net/you-do-not-need-blockchain-eight-p...