# Metadata & Provenance

Each Conditional Claim NFT adheres to a standardized metadata schema, ensuring full transparency and auditability.<br>

Metadata includes:

* Bar serial number
* Weight and purity
* Fine gold content (troy ounces)
* Vault identifier
* Jurisdiction
* Refiner / producer
* Assay reference
* Vault cryptographic attestation
* Tokenization timestamp<br>

All metadata is:

* Immutable once minted
* Publicly verifiable
* Cryptographically signed by the vault
* Anchored to the Global Gold Registry

This creates bar-level proof-of-reserves by design.