Currently, the Brainstorm prototype publishes personalized trust metrics as kind 30282 events as per the Trusted Assertions NIP. Each event publishes one event with multiple trust metrics (personalized GrapeRank, personalized PageRank, hops, verified followers count, and a few more) for one pubkey, as seen from the perspective of another pubkey’s WoT.

Calculating the scores is the hard part. Publishing them is relatively easy. It would not be difficult to publish a modified Trusted Assertion that contains scores for a list of pubkeys, not just one. Maybe a modification of a NIP-51 list.