Commodity provenance
Anyone can claim an origin. Earn a tier instead.
Every provenance claim starts as your word for it. SourceProof turns it into something a buyer can check, one rung at a time: sealed so nobody can quietly edit it, backed by a verified company, corroborated by clean parties, and finally attested by someone other than you. The tier is derived by the platform, never set by the issuer, so a passport cannot claim a rung it has not earned.
4
Authenticity tiers
10
Per-commodity packs
8
Custody event types
Public
Verification link
Why it matters
Built to be believed.
A tier you earn, not a badge you set
The platform derives the tier from what is actually in place: the seal, the issuer's verification, the parties' standing, independent attestation. Nobody can promote their own passport.
It tells you exactly what is missing
Every rung you have not reached comes with the specific requirement standing in the way, not a vague score. Have an independent counterparty co-attest a custody event. Complete KYB. Resolve the flag on this party.
Evidence, not checkboxes
Compliance items only count as complete when a supporting document is attached, so progress means proof rather than someone ticking a box.
The ladder
Four rungs, each earned by something checkable
Provenance is not on or off. It is a graded claim, and the grade is what a buyer, an auditor or a bank actually wants to know. Each rung is derived from real state, never from a status the issuer picked.
- Self-declared: the record says what you say it says. Useful internally, but your word is all a buyer has
- Tamper-evident: sealed, so the custody chain, documents and checklist are hashed and any later edit shows
- Corroborated: a business-verified or LEI-registered company stands behind a sealed record, with no flagged party in the chain
- Independently Verified: someone other than you has co-attested a custody event, and every required evidence document is attached
Public passport
VerifiedGold · 500 kg · 99.5%
tradeflow-os.com/verify/3b9c… · no login
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
Due diligence
Per-commodity due diligence on the OECD 5-step spine
The OECD 5-Step Framework is one risk-based spine; each commodity plugs in the regime that governs it. Checklist progress only advances when the required supporting document is attached.
- Ten commodity packs: LBMA gold, LPPM platinum and palladium, OECD 3TG, Kimberley diamonds, OECD-FAO cocoa and agriculture, EITI energy, and more
- The five steps: management system, risk assessment, risk response, third-party audit, public reporting
- Audit and reporting handled as party evidence: satisfied by an attached report, or a documented gap
- Mined vs recycled sourcing filters the checks that apply; items gated on real evidence such as assay certificates and mining licenses
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 metals, minerals, diamonds, energy, and agricultural commodities
- Created inside the deal as its Product, so provenance travels with the trade
Public passport
VerifiedGold · 500 kg · 99.5%
tradeflow-os.com/verify/3b9c… · no login
How it works
From start to proof.
Add the product
In the deal's Product tab, add the commodity being traded with its origin, weight, purity, and mined or recycled sourcing.
Build the custody chain
Add each custody event with location, timestamp, and supporting evidence documents.
Seal it, and climb
Sealing makes the record tamper-evident and starts the ladder. The passport then tells you the exact requirement for each rung above you.
Share the tier
Send the public verification link. Anyone can see which rung the passport reached and why, with no login.
FAQ
Common questions.
What does a provenance passport prove?
It depends on its tier, and the tier says so plainly. At the first rung it proves you claimed something. Sealed, it proves the claim has not been edited since. Corroborated, it proves a verified company with clean parties stands behind that unedited claim. Independently Verified, it proves someone other than you attested to a step and the evidence is attached. We would rather a buyer see an honest first rung than a badge that means nothing.
Can I just mark my own passport as verified?
No, and that is the point. The tier is computed by the platform from the seal state, the issuing company's verification, the compliance standing of every party in the chain, and whether an independent counterparty has attested. It never reads a status you set. A passport cannot promote itself.
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?
Ten commodity packs, each with its own checklist tailored to that supply chain: LBMA gold, LPPM platinum and palladium, OECD 3TG, OECD minerals, Kimberley Process and RJC diamonds, OECD-FAO cocoa, EU Deforestation Regulation crops, OECD-FAO general agriculture, EITI energy, and a general fallback for unclassified commodities. Your commodity selects its pack automatically.
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.