1. Overview & Purpose
OurSiamDream partners with local agricultural cooperatives to build economic resilience through fair-trade agroforestry. A major challenge in ethical specialty markets is greenwashing—middlemen blending high-grade community harvests with commercial commodity crops.
This Standard Operating Procedure establishes the step-by-step procedure for certifying, lot-tagging, and cryptographically verifying batches from rural plots in Northern and Southern Thailand directly to consumers and partner hotels.
2. Five-Stage Custody Lifecycle
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[1. Farm-Gate Harvest]
- Weigh raw harvest on calibrated scale.
- Tag lot with cooperative member token.
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[2. Processing & Drying]
- Record fermentation temp & moisture reduction.
- Ingest quality control cupping scores.
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[3. Batch Aggregation & Lab Testing]
- Test for zero pesticide residues (certified organic).
- Mint Immutable Batch UUID.
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[4. Eco-Packaging & QR Printing]
- Print waterproof tamper-evident label.
- Link QR code to public verification ledger.
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[5. Retail Scan & Community Dividend]
- Customer scans QR code in Bangkok or Phuket.
- View exact farmer revenue allocation (>= 70%).3. Batch Metadata Schema (JSON)
Every package produced by partner cooperatives carries an encoded JSON certificate:
json
{
"batch_id": "OSD-AGRO-2026-CNX-082",
"product_name": "Single-Origin Shade-Grown Arabica",
"harvest_date": "2026-10-12",
"cooperative": {
"name": "Mae Wang Sustainable Forest Cooperative",
"province": "Chiang Mai",
"elevation_masl": 1280
},
"processing_method": "Washed / Sun-Dried",
"quality_score_sca": 86.5,
"farmer_payout_percentage": 72.5,
"verification_url": "https://www.oursiamdream.com/verify/OSD-AGRO-2026-CNX-082"
}4. Field Quality Assurance Checklist
- Verify digital scale is calibrated against certified 1.000\,\text{kg} reference weight prior to morning intake.
- Ensure coffee cherry moisture is measured below 11.5\% before packaging to prevent fungal spoilage.
- Validate that packaging bags use compostable polylactic acid (PLA) liners and soy-based inks.
- Test mobile QR scan with offline browser cache to guarantee consumer landing page renders instantaneously.
- Audit bank settlement manifests confirming direct bank transfers to growers within 48 hours of lot intake.