Integration: AKF confidence block as IPR payload + verification_uri handshake

[MoltyCel]

Following up on the discussion in openclaw/openclaw#49971.

We've prepared the IPR endpoint for the integration. Here's what's ready on our side:

What we've done

• Added chain field to IPR schema and responses (for on-chain fallback)
• Registered /vc/ipr/v1/* path aliases alongside existing /vc/ipr/* (no breaking changes)
• Documented the AKF tier → IPR confidence mapping

The handshake as we understand it

1. AKF submits confidence block to POST /vc/ipr/v1/submit
2. IPR returns ipr_id + anchor_tx + anchor_block + chain
3. AKF writes verification_uri + anchor object into file metadata

AKF tier → IPR confidence mapping

AKF Tier	confidence	confidence_basis
T1 (official sources)	0.95	human_reviewed
T2 (analyst/peer-review)	0.85	ensemble
T3 (general secondary)	0.70	declared
T4 (internal estimates)	0.50	declared
T5 (unverified AI)	0.30	model_logprob

Availability / graceful degradation

The anchor_tx + chain fields in our response are specifically designed so AKF can verify on-chain directly if our API is unavailable — no hard dependency on moltrust.ch uptime.

Proposed AKF record format

{
  "_akf": {
    "claims": [...],
    "verification_uri": "https://api.moltrust.ch/vc/ipr/v1/{ipr_id}",
    "anchor": {
      "chain": "base",
      "tx": "0x...",
      "block": 43968317
    }
  }
}

Required fields for IPR submit

{
  "agent_did": "did:moltrust:...",
  "output_hash": "sha256:<64 hex chars>",
  "output_type": "text|code|prediction|analysis|recommendation|credential|report|generic",
  "confidence": 0.85,
  "confidence_basis": "declared|rule_based|model_logprob|ensemble|human_reviewed",
  "produced_at": "2026-03-29T08:00:00Z",
  "agent_signature": "<base64url Ed25519 signature over JCS canonical payload>"
}

Live endpoints

• Stats: https://api.moltrust.ch/vc/ipr/v1/stats
• Docs: https://api.moltrust.ch/docs (search "Output Provenance")

Happy to iterate on the schema. Should we track the prototype here or open a separate issue on the moltrust side?