A potential use case, as laid down by John Wolpert for this:

Abbott Labs machines baseline their results for verified fast patient use —

When a physician, hospital other clinical provider receives one of the new Abbott Labs testing machines, they go through a quick web setup where they create a Workgroup consisting of everyone who should get any results from this machine. When this occurs, a Shield Contract, orgRegistry and Verifier Contract is created on Mainnet. (Not included at this point is the later inclusion of a specific Patient in the Workgroup. This is a difference to be considered from the Radish34 POC, where everyone is included at Workgroup setup…will need a way to add parties to the orgRegistry mid-stream.)

Just before a Patient gets tested by the machine, they are offered the opportunity to get their test results baselined to their private database. In this story, let’s imagine 1Password has been equipped to receive baseline messages and interact with baseline proofs and workflows. So here the patient would provide their orgRegistry data, which would include the 1Password endpoint that will receive the test result messages. (1Password is just one storage idea…could also be Uport. Using 1Password to make the point that this component can be old-school and not a cryptosystem.)

Now they have the actual in-the-clear data of their test results, sent via p2p secret message into their 1Password API endpoint. And they also have the baselineProof/hash and its location on the Mainnet (which now sits inside the Workgroup’s shield contract).

Now, say the Patient wants to go to Coachella 2021, and their new policy is you need to have shown that you actually had COVID and recovered more than N weeks or months prior to the event (imagining a scenario where an event would only want to admit post-symptomatic positives because they are sure to be immune and no longer shedding virus). The Patient goes to Coachella’s web site and provides the baseline proof from 1Password. Here’s another “wrinkle” from the Radish34 example. Here, we want a method to bring the Coachella system into the baseline in such a way that they get only a subset of the data that is baselined between the Patient and the clinic/etc….or another approach would be to set things up in such a way that 1Password messages Coachella with the name/ID and the material (“result is positive,” “date is XYZ”) that can be checked against the baseline to confirm authenticity without having to get the clinic or other healthcare providers involved.