Sure! Here are some resources that can help you understand how to store verifiable credentials and personally identifiable information (PII) using IPFS:

The IPFS documentation provides a guide on how to store files on IPFS: Storing Files on IPFS

The Verifiable Credentials Data Model (VC Data Model) is a W3C specification that defines a standard way to express verifiable credentials. You can learn more about it here: Verifiable Credentials Data Model

The Ceramic Network is a decentralized network built on IPFS that focuses on storing and managing verifiable credentials. You can find more information about it here: Ceramic Network

If you're interested in privacy-preserving storage of PII, you might want to explore the concept of zero-knowledge proofs (ZKPs). ZKPs allow you to prove the validity of certain information without revealing the actual information itself. This can be useful for storing sensitive data on IPFS. You can learn more about ZKPs here: Zero-Knowledge Proofs

Remember to always consider the security and privacy implications when storing sensitive information on IPFS or any other decentralized storage system.