Organic certifications, food safety inspections, allergen declarations — every claim is an observe block with a verifiable hash.
Food fraud costs the global industry an estimated $40 billion per year. Certifications are PDFs in filing cabinets. Organic labels are applied based on trust, not verification. A 2024 EU study found that 10% of organic products tested showed traces of prohibited pesticides. The problem is not dishonesty — it is that the systems for proving honesty are broken.
Every certification, inspection, and review is an observe block with a verifiable hash. Trust is computed from evidence, not assumed.
{
"type": "observe.certification",
"state": {
"standard": "Soil Association Organic",
"level": "Full Organic",
"certificate_number": "SA-2025-08814",
"issued": "2025-03-15",
"expires": "2026-03-14",
"scope": [
"wheat", "barley", "oats",
"mixed vegetables"
],
"inspection_date": "2025-03-10",
"inspector": "J. Thompson",
"status": "active"
},
"refs": {
"subject": "a1b2c3d4...",
"certifier": "e5f6a1b2...",
"previous_cert": "c3d4e5f6..."
}
}{
"type": "observe.inspection",
"state": {
"authority": "Southwark Council",
"scheme": "Food Hygiene Rating",
"rating": 5,
"rating_label": "Very Good",
"date": "2025-11-20",
"areas": {
"hygienic_food_handling": "good",
"cleanliness": "good",
"management_of_food_safety": "good",
"structural_compliance": "good"
},
"next_due": "2026-11-20",
"published": true
},
"refs": {
"subject": "d4e5f6a1...",
"authority": "b2c3d4e5...",
"previous_inspection": "f6a1b2c3..."
}
}{
"type": "observe.review",
"state": {
"rating": 5,
"text": "Best sourdough I've ever had. You can taste the quality of the flour. Been coming here for 2 years and the consistency is remarkable.",
"verified_purchase": true,
"purchase_date": "2026-02-15",
"aspects": {
"taste": 5,
"value": 4,
"freshness": 5,
"service": 5
}
},
"refs": {
"subject": "f6a1b2c3...",
"author": "a1b2c3d4...",
"venue": "d4e5f6a1...",
"purchase": "e5f6a1b2..."
}
}The trust score for any entity is computed from the block evidence connected to it. It is not a single number — it is a weighted aggregation of all observe blocks that reference the entity, refreshed whenever new evidence arrives.
// Query trust score for any entity
GET /api/v1/trust/:hash
{
"entity_hash": "d4e5f6a1...",
"entity_type": "actor.venue",
"trust_score": 87,
"evidence_count": 14,
"breakdown": {
"certifications": { "score": 95, "count": 2, "weight": 0.40 },
"inspections": { "score": 88, "count": 1, "weight": 0.25 },
"reviews": { "score": 72, "count": 8, "weight": 0.15 },
"provenance": { "score": 90, "count": 1, "weight": 0.10 },
"freshness": { "score": 95, "count": 2, "weight": 0.10 }
},
"last_updated": "2026-02-18T10:30:00Z"
}When trust is computed from evidence instead of assumed from labels.
An organic certification references a certifier. The certifier is an actor block with its own trust history. If the certifier is flagged, every certification they issued is flagged too. Graph propagation catches fraud that siloed systems miss.
Certifications have expiry dates in their state. Agents monitor the network and alert when certifications are about to lapse. No more expired certificates hanging on walls while auditors look the other way.
Scan any product and see its trust score — computed from real certifications, real inspections, and real reviews. Not marketing claims. Not self-declarations. Verifiable evidence.
Regulators query the block graph instead of requesting paper records. The audit trail IS the block graph. HACCP compliance, allergen declarations, temperature logs — all observation blocks, all verifiable.
Query trust scores, verify certifications, and build trust-aware applications. The Trust API is live in the sandbox.