{
 "url": "https://activatedigital.ai/knowledge/evidence/chain-of-custody-models",
 "title": "Identity Preserved, Segregated, Mass Balance and Book-and-Claim: What Each Model Proves",
 "description": "Compare identity-preserved, segregated, mass-balance and book-and-claim chain-of-custody models, including what each can and cannot prove about a product claim.",
 "territory": "evid",
 "category": null,
 "direct_answer": "**Identity preserved** keeps a specified source or input identity distinct through the chain. **Segregated** keeps qualifying material physically separate from non-qualifying material while allowing qualifying material to be combined within the scheme's rules.",
 "last_verified": "2026-09-10",
 "datePublished": "2026-09-10",
 "dateModified": "2026-09-10",
 "legislation": [],
 "primary_sources": [
  {
   "url": "https://www.iso.org/standard/72532.html",
   "name": "ISO 22095:2020, Chain of custody: General terminology and models"
  },
  {
   "url": "https://www.iso.org/standard/90678.html",
   "name": "ISO 22095:2020/Amd 1:2026"
  },
  {
   "url": "https://www.iso.org/standard/84427.html",
   "name": "ISO 22095-2:2026, Requirements and guidelines for mass balance"
  },
  {
   "url": "https://www.iso.org/standard/84426.html",
   "name": "ISO 22095-3:2026, Requirements and guidelines for book and claim"
  },
  {
   "url": "https://www.iso.org/standard/95245.html",
   "name": "ISO/CD 22095-1, Chain of custody: Part 1, General terminology and models, committee draft, under development"
  }
 ],
 "glossary_terms": [
  "https://activatedigital.ai/knowledge/glossary#digital-product-passport",
  "https://activatedigital.ai/knowledge/glossary#traceability"
 ],
 "watch": [],
 "decisions": [],
 "alternates": {
  "html": "https://activatedigital.ai/knowledge/evidence/chain-of-custody-models",
  "markdown": "https://activatedigital.ai/knowledge/evidence/chain-of-custody-models.md",
  "json": "https://activatedigital.ai/knowledge/evidence/chain-of-custody-models.json"
 }
}