C2PA https://C2PA.org uses CAWG https://cawg.io/ for identity, I am moving towards building prototypes that map context with JSON-LD to CAWG Context https://cawg.io/identity/1.1/ica/context/ for Nostr and bridging it to ProofMode https://ProofMode.org for interoperability.

https://proof-chain.pages.dev/