Chain of Custody: Extend Model to Cover Confidential Information Exchange Standards

[harleytrustprovenance]

Impacted sections

• https://uncefact.github.io/spec-untp/docs/specification/ChainOfCustody

Issue Description

We need to extend the current model to support two types of standards:

1. Confidential Information Exchange – The standard governing data shared between members and auditors.
2. Public Attestations – The standard for attestations issued by the auditor that can be publicly shared.

Tasks:

• Define a framework for handling confidential vs public attestations.
• Extend the existing model to incorporate this distinction
• Provide example implementations where possible.

This issue is in reference to, and dependent on, PR #253