実験: 他人に署名してもらったVP。challengeはpubkeyと一致するがPPIDが異なる
https://gist.githubusercontent.com/awesome-awesome-git/fc7153163fe3491dc2e60ff9fdebaeab/raw/86926b7aed69864e645756ac27e5a1bf439c621e/JaneDoe.jsonld#verifiable-presentation 

 社員です https://gist.githubusercontent.com/awesome-awesome-git/7a6f1aac0af5d856653872dd8c4f295f/raw/22401be133b7e019be79362897b4cdf3ca1f6026/NostrProfile3.jsonld#verifiable-presentation