nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpq7qufpd8g9d2gwdmae8vm9t2gjfpk6g0z6qurp5jgdjyp5u8mn5gs4jg82v There's an anonymous OV Chipkaart you can buy. They don't have to linked to your name ...