Jira progress: loading…

AFLE

Cross-ECO Assurance and Federated Lineage Exchange

Federated Provenance, Supply-Chain Transparency, and Carbon Passport Interoperability

1. Purpose

The Cross-ECO Assurance Framework enables secure, standardized, and verifiable exchange of lineage metadata between independent ZAYAZ tenants, suppliers, auditors, buyers, regulators, and assurance providers.

It extends the ZAYAZ provenance architecture beyond organizational boundaries by federating:

USO runtime lineage
SSSR semantic definitions
ZAR artifact references
ZSSR routing attestations
TrustGate trust evaluations
DAL assurance events

into a shared trust ecosystem.

The framework enables:

Supply-chain transparency
Scope 3 verification
Carbon passport interoperability
Cross-organizational assurance
Federated trust propagation
Digital product passport integration

while preserving data sovereignty and commercial confidentiality.

Rather than exchanging raw data, organizations exchange E-C-O™ Numbers and the associated cryptographically verifiable proofs, trust attestations, carbon passports, lineage references, and assurance evidence linked to those identifiers.

This federation model underpins the ECO Number Network, linking entities via verifiable digital identifiers and cryptographically signed data attestations.

This enables organizations to collaborate on sustainability reporting and assurance without exposing sensitive business information.

2. Strategic Objectives

The framework is designed to:

Objective	Description
Data Sovereignty	Organizations retain ownership of source data
Cross-ECO Assurance	Enable assurance across organizational boundaries
Supply Chain Transparency	Improve visibility into upstream and downstream emissions
Carbon Passport Exchange	Enable interoperable product-level assurance
Regulatory Readiness	Support CSRD, DPP, ISO 14083 and PAS 2080
Trust Federation	Propagate trust across interconnected organizations
Auditability	Allow independent verification of shared proofs

3. Federated Architecture

┌──────────────────────────┐
│ Supplier A               │
│ ECO-196-123-654-444      │
└──────┬───────────────────┘
       │
       ▼

┌─────────────────────────┐
│ Federation Gateway      │
│ (ZSSR Federated Router) │
└─────────┬───────────────┘
          │
          ▼

┌─────────────────────────┐
│ Federated Assurance     │
│ Ledger (FAL)            │
└─────────┬───────────────┘
          │
          ▼

┌──────────────────────────┐
│ Buyer B                  │
│ ECO-055-321-456-777      │
└──────┬───────────────────┘

        ▲
        │
        ▼

 Auditor Nodes
 Regulator Nodes
 Assurance Providers

Each participant maintains independent local infrastructure while exchanging only verified proofs and attestations.

4. Federation Components

Component	Purpose
USO	Local runtime lineage
SSSR	Semantic consistency
ZAR	Artifact references
ZSSR	Federation routing
TrustGate	Trust evaluation
DAL	Local assurance events
FAL	Federated proof registry
AIGS	AI provenance governance
TCMS	Historical continuity
ECO Number Network	Federated identity layer

5. Core Concepts

Concept	Description
ECO Number	Global entity identifier
Lineage Proof	Cryptographic summary of lineage
Attestation Bundle	Signed proof package
Carbon Passport	Product or supplier assurance package
Federated Assurance Ledger (FAL)	Registry of shared assurance proofs
Federated Replay	Cross-instance verification workflow
Trust Propagation	Trust inheritance across value chains
Assurance Level	Shared assurance classification

6. DAL and FAL Relationship

The framework distinguishes between local assurance records and federated proof exchange.

DAL

Digital Assurance Ledger

Stores:

approvals
verifier decisions
evidence acceptance
assurance events
trust transitions

within a single organization.

FAL

Federated Assurance Ledger

Stores:

proof digests
attestation references
federation signatures
proof anchors

across organizations.

Organization A
     DAL
       ↓
Federated Attestation
       ↓
FAL
       ↓
Organization B
     DAL

DAL governs local assurance.

FAL governs federated proof verification.

7. Data Exchange Philosophy

The framework follows three principles.

Data Sovereignty

Raw operational data remains local.

Cryptographic Trust

All attestations are digitally signed.

Interoperability

Proofs conform to open standards and interoperable schemas.

8. Attestation Bundle Structure

Each shared proof follows the ZAYAZ Federated Lineage Attestation Schema.

attestation-bundle-structure.jsonGitHub ↗
{
  "@context": ["https://schema.zayaz.io/lineage/v1"],
  "id": "urn:uso:01JBF0W8S9Q0R1S2T3U4V5W6X",
  "issuer": "ECO-196-123-654-444",
  "issued_at": "2026-10-25T09:40:00Z",
  "assurance_level": "A4",
  "assurance": {
  "dal_event_id": "DAL-2026-00321"
  },
  "signal": {
    "csi": "MICE.InvoiceEmissions.OUTPUT.CO2E.1_0",
    "trust_score": 0.93,
    "quantity": {"value": 56.2, "unit": "kgCO2e"},
    "period": {"from": "2025-09-01", "to": "2025-09-30"}
  },
  "lineage": {
    "origin_chain_codes": ["DSA9Q","NML4C","MIE12","TG3K7"],
    "hash_chain_root": "d05f…9a1e"
  },
  "proof": {
    "type": "Ed25519Signature2020",
    "created": "2025-10-25T09:41:00Z",
    "proofPurpose": "assertionMethod",
    "verificationMethod": "did:ZAYAZ:ECO-A123#trustgate-key",
    "jws": "eyJhbGciOiJFZERTQSJ9..Hk3JfK..."
  }
}

No confidential transactional data is exchanged.

Only verifiable metadata, proofs, and assurance references are shared.

9. AI Provenance Attestations

Federated proofs may include AI-origin metadata.

Example:

ai-provenance-attestations.jsonGitHub ↗
{
  "ai_contributions": [
    {
      "agent": "MaterialityMentor",
      "model_version": "gpt-5.5",
      "confidence_score": 0.92
    }
  ]
}

AI provenance remains governed through AIGS.

10. Exchange Workflow

Step	Actor	Action	Output
1	Supplier	Generate attestation	Attestation Bundle
2	Federation Gateway	Validate signature	Proof registered
3	FAL	Record digest	Proof anchor
4	Buyer	Retrieve attestation	Trust update
5	TrustGate	Recompute trust	Updated trust profile
6	Auditor	Verify proof chain	Assurance evidence

11. Federation Routing

All federation traffic is governed by ZSSR.

Routing decisions may consider:

jurisdiction
trust requirements
assurance levels
organization type
regulatory requirements

Federation Request
        ↓
ZSSR Federation Router
        ↓
Federation Gateway
        ↓
Remote ECO

12. Federation Gateway API

Endpoint	Method	Purpose
`/federation/attestations`	POST	Register attestation
`/federation/attestations/{uso_id}`	GET	Retrieve proof
`/federation/eco/{eco_number}/trust`	GET	Trust profile
`/federation/replay/{attestation_id}`	POST	Federated replay
`/federation/ledger/verify/{hash}`	GET	Verify proof anchor

All communication uses:

Mutual TLS
OAuth2
JSON-LD signatures
Ed25519 or ECDSA signatures

13. Carbon Passport Assembly

A Carbon Passport represents a verified footprint package for a product, project, facility, or supplier.

Structure

Field	Description
passport_id	Unique identifier
passport_version	Passport version
methodology_version	Applied methodology
eco_number	Entity identifier
attestation_refs	Source attestations
assurance_level	Assurance classification
verification_status	Verification outcome

Example

carbon-passport-assembly.jsonGitHub ↗
{
  "passport_id": "CP-2025-091",
  "passport_version": "1.2",
  "methodology_version": "ESRS-E1-2026",
  "assurance_level": "A4",
  "eco_number": "ECO-196-123-654-444",
  "period": {"from": "2025-01-01", "to": "2025-12-31"},
  "attestation_refs": [
    "urn:uso:01JBF0W8S9Q0R1S2T3U4V5W6X",
    "urn:uso:01JBF1XYZ..."
  ],
  "aggregate_metrics": {
    "co2e": {"value": 12450, "unit": "kgCO2e", "uncertainty": 0.03}
  },
  "verification_status": "verified",
  "signature": "eyJhbGciOiJFZERTQSJ9..."
}

14. Trust Propagation

Trust can propagate through value chains.

Supplier Trust
      ↓
Passport Trust
      ↓
Buyer Trust
      ↓
Portfolio Trust

TrustGate evaluates:

trust inheritance
confidence degradation
proof quality
attestation coverage

before propagating trust.

15. Federated Replay

Federated Replay extends Operational Assurance across organizational boundaries.

Supplier Proof
      ↓
Buyer Replay Request
      ↓
Federated Verification
      ↓
Assurance Result

This enables:

Scope 3 verification
supplier audits
carbon passport validation
regulator review

without exposing source data.

16. Trust Aggregation

The platform computes:

These metrics continuously update TrustGate profiles.

17. Governance and Security

Controls include:

Digital signatures
Mutual TLS
OAuth2 authorization
Ledger anchoring
Revocation services
Signature verification
TrustGate key management
Federated audit logging

All federation activity is logged and traceable.

Example Verification Query (Cross-ECO)

Buyer verifying a supplier’s attestation:

curl https://hub.zayaz.io/federation/attestations/01JBF0W8S9Q0R1S2T3U4V5W6X \
  -H "Authorization: Bearer <token>" \
  | jq '.proof.verificationMethod, .signal.trust_score’

↓

supplier-attestation.jsonGitHub ↗
{
  "proof.verificationMethod": "did:ZAYAZ:ECO-A123#trustgate-key",
  "signal.trust_score": "0.93"
}

↓

Result:

"did:ZAYAZ:ECO-A123#trustgate-key"
0.93

This confirms that the attestation originated from supplier ECO-A123 and maintains a verified trust score of 0.93.

18. Regulatory Alignment

Standard	Requirement	ZAYAZ Mechanism
CSRD Art. 26	Cross-company traceability	Federated lineage proofs
ESRS E1/E5	Supplier data provenance	Carbon Passports
ISO 14083	Value-chain exchange	Federated Attestations
PAS 2080	Supply-chain collaboration	ECO Network
EU DPP	Product traceability	Carbon Passport linkage
EU AI Act	AI transparency	AIGS provenance

Example End-to-End Cross-ECO Chain

Stage	Entity	Artifact	Trust Level	Assurance Level	DAL Ref	FAL Ref	Exchange Artifact
Supplier	ECO-A123	MIE12	0.93	A3	DAL-2026-00121	FAL-2026-10111	Attestation Bundle
Buyer	ECO-B456	TG3K7	0.91	A3	DAL-2026-00457	FAL-2026-10111	Trust Update
Auditor	ECO-AUD01	VRE77	—	A4	DAL-2026-00883	FAL-2026-10111	Assurance Report
Regulator	EU-CSRD	Regulatory Validation Record	—	A5	DAL-2026-01002	FAL-2026-10111	Ledger Verification Proof

Note:

DAL = Local assurance memory
FAL = Federated assurance memory

19. Federation Governance

The framework is designed for future alignment with:

EGFS
FITI
EAC
ECO Number Governance
Digital Product Passport ecosystems

These governance models provide interoperability between independent assurance networks.

20. Future Enhancements

Initiative	Description
Zero-Knowledge Lineage Proofs	Privacy-preserving verification
ECO DID Registry	W3C DID integration
EU DPP Integration	Product passport interoperability
Real-Time Trust Feeds	Continuous trust exchange
Federated Assurance Marketplace	Third-party verification services
Autonomous Federation Agents	AI-assisted federation workflows

21. Summary

The Cross-ECO Assurance Framework extends ZAYAZ from a platform of traceability into a network of trust.

Organizations exchange:

lineage proofs
trust attestations
assurance evidence
carbon passports

rather than raw operational data.

By combining:

USO
SSSR
ZAR
ZSSR
TrustGate
DAL
FAL
AIGS

the framework creates a federated assurance ecosystem capable of supporting global supply-chain transparency, carbon passport interoperability, and machine-verifiable sustainability assurance across organizational boundaries.

GitHub Repo Request for Change (RFC)

Federated Provenance, Supply-Chain Transparency, and Carbon Passport Interoperability​

1. Purpose​

2. Strategic Objectives​

3. Federated Architecture​

4. Federation Components​

5. Core Concepts​

6. DAL and FAL Relationship​

DAL​

FAL​

7. Data Exchange Philosophy​

Data Sovereignty​

Cryptographic Trust​

Interoperability​

8. Attestation Bundle Structure​

9. AI Provenance Attestations​

10. Exchange Workflow​

11. Federation Routing​

12. Federation Gateway API​

13. Carbon Passport Assembly​

Structure​

Example​

14. Trust Propagation​

15. Federated Replay​

16. Trust Aggregation​

17. Governance and Security​

18. Regulatory Alignment​

19. Federation Governance​

20. Future Enhancements​

21. Summary​