Commodity provenance
Prove where the commodity came from.
Chain-of-custody passports for physical commodities, with a custody timeline, evidence on every step, OECD-aligned compliance checklists, and a public verification link. Prove origin and integrity to buyers, auditors, and regulators without a login.
8
Custody event types
4
Compliance frameworks
Evidence-gated
Checklist progress
Public
Verification link
Why it matters
Built to be believed.
Custody you can show
A timeline from extraction to delivery, with documents and coordinates attached to each step.
Evidence, not checkboxes
Compliance items only count as complete when a supporting document is attached, so progress means proof.
Verified at the source
Third parties such as assay labs and logistics partners can attest to events, so claims are not just self-declared.
Custody
A timeline from source to delivery
Record every custody event with location, coordinates, timestamp, and evidence, building a complete and chronological chain of custody for the commodity.
- Eight event types: extraction, consolidation, assay, transport, export, import, refining, delivery
- Location, GPS coordinates, and timestamp on every event
- Multiple evidence files per custody event
- Third-party attestations mark events as independently verified
SourceProof
VerifiedGold · 500 kg · 99.5%
- Extraction · Ghana
- Assay · LBMA refiner
- Export · customs cleared
- Delivery · Zürich
OECD due diligence · publicly verifiable
Compliance
OECD-aligned checklists, evidence-gated
Four frameworks cover minerals, energy, agriculture, and a general fallback. Checklist progress only advances when the required supporting document is attached.
- OECD minerals, energy, agricultural, and general frameworks
- Items gated on real evidence such as assay certificates and transport manifests
- Progress calculated only over evidence-satisfied items
- Document OCR checked against the fields expected for the commodity
OECD checklist
67%Origin documented
Certificate of origin
Chain of custody
Transport manifest
Tax compliance
Evidence needed
Progress counts only evidence-backed items
Verification
Publicly verifiable, no login
Each passport has a public verification link you can share with anyone, with token-based sharing controls when you need to grant edit or time-limited access.
- Unique public verification link, shareable with anyone
- Token-based shares with view or edit permission and optional expiry
- Supports gold, minerals, energy, and agricultural commodities
- Link a passport to a deal or counterparty
Public passport
VerifiedGold · 500 kg · 99.5%
tradeflow.os/verify/3b9c… · no login
How it works
From start to proof.
Create a passport
Start a provenance passport for the commodity with its origin, weight, and purity details.
Build the custody chain
Add each custody event with location, timestamp, and supporting evidence documents.
Clear the checklist
Work the OECD-aligned framework; items complete only when backed by real evidence.
Share and verify
Send the public verification link to buyers, auditors, or regulators to confirm the chain.
FAQ
Common questions.
What does a provenance passport prove?
It documents the commodity's origin and full chain of custody, with evidence on each step and a public link so buyers, auditors, and regulators can verify it independently.
What does evidence-gated mean?
Certain compliance items only count as complete when a supporting document is attached, such as a certificate of origin or a transport manifest. Progress reflects real proof, not checkboxes.
Which compliance frameworks are supported?
Four: OECD minerals, energy, agricultural, and a general fallback for unclassified commodities, each with its own checklist tailored to that supply chain.
Can buyers verify without an account?
Yes. Every passport has a public verification link that anyone can open, and you control sharing with token-based view or edit permissions and optional expiry.