Zanii proof

Receipt sha256:a8011db58f2c2e9fb8c16cdb83f3c06843b2863382c0afd14c7b25d658883b6f — leaf #4198

Verification PROVEN

✔Receipt signature, delegation chain, and scope — signed by did:key:z6MkksYZxAX4EpiA…

✔Delegation not revoked

✔Merkle inclusion proof against current tree root

✔Signed tree head signature — log did:key:z6Mkt3UL3dCEigCh…

Anchoring

✔Covered by anchor at tree size 4353 — zanii:34fcb38c67663e785816996c5a2fec034dbdf3dcf0be246a0670d36330b59eb1 (block 21693)

Receipt

{
  "v": 1,
  "ts": "2026-08-15T02:00:10.751Z",
  "sig": "ed25519:a59d1ca5030dd6500c7f4372858041c75546682e19907fa635d6fd54624679e1d09182667c2dd4e3529ae047999a0a879a8f436a7917e6e5a26d8a76758dcd0a",
  "prev": "sha256:5b97d08f2f0082a2330b3a2cf47095619ea15bef439f25934488e1b2de1bf968",
  "action": "tool_call",
  "target": "ads.investigate.evidence",
  "agent_id": "did:key:z6MkksYZxAX4EpiAetcDB3uN9w1FY7LjriS966ZPCTMtCzXt",
  "delegation": [
    {
      "v": 1,
      "exp": "2027-07-06T21:17:24Z",
      "sig": "ed25519:d7ddef78324cfcbfe417611c4f135cbbcc2858ea076ddf7d8a0c41c6edc0c9aab906fc175bd92614c54d9ba76891a94941a7b9d7fa560be9c1588755c962bc08",
      "issuer": "did:key:z6MksQZm73wT4p97GUjdKC4SJxgsm8dzizoLCBE8U2QRRZBb",
      "scopes": [
        "ads.investigate.*"
      ],
      "subject": "did:key:z6MkksYZxAX4EpiAetcDB3uN9w1FY7LjriS966ZPCTMtCzXt"
    }
  ],
  "subject_tag": "sha256:51e5d015a51da3d46d7f5f5ea126970d229e7297aef867b87096085ffc33e42d",
  "payload_hash": "sha256:3d616f03edbec2b04cec082b835811da35712db71f616761baa98e2fd0105cd8"
}

Inclusion proof

{
  "index": 4198,
  "tree_size": 4353,
  "path": [
    "2eac9cad0979bbd07a7ee89f2a5ef466ee1a9d502ffbc78afc9a4e00076428a3",
    "5d00e065f52bc998e24295ea048cc95a1d6d9e0fa73d7a418b00a57f757445cf",
    "734f943d9e57675eb4b0a21b9ceebd2f76db1a9d03b45793a4ba6f1b4aa064b2",
    "fd2d1dcb387ca9f745dac81a6c8efb97d4c6f536707dcb8d946bad1a13139953",
    "c70efa7ee5b1de8dc6d53fe969b524d08b228396df7240996d54e3d3c5e91f1f",
    "0185ce799cd1ce293da757511dc31174867860b2657cb29361c53b78c3c1c289",
    "736a081e54e8bed6664b7451e3b58877be18a93b4719b4c022b25f6747d2a5bf",
    "d109c4a5ddc4246146e92d0a889a2505421503b74b8e4556889e000a44ac89a8",
    "cc6be04373f43c05afaab5f1bb350502d06cff2a9eadd5803cfc41464f822b04",
    "c3310bbc7505d7ab6534f5142146d3f686b80a369526056f43a3c77e2dc4240a"
  ]
}

Signed tree head

{
  "v": 1,
  "log_id": "did:key:z6Mkt3UL3dCEigChGEJKSdhSra7JRoG2z1GLtbrLCKnL5GX2",
  "size": 4353,
  "root": "sha256:9b710a4755e52983ef28d15ee7b32ff5cb0e058cf326c9999c89bf56cecb783c",
  "ts": "2026-08-17T12:26:37.054Z",
  "sig": "ed25519:d33f1db1988d2c010f56980de6b70986d6bc71546f856de4a6cedec051c3466d14999e3fbdccc7bbb2a38745a0203f367a55b8870707fbce0812973fac2b1a09"
}

Verify independently

curl {this host}/v1/proof/sha256:a8011db58f2c2e9fb8c16cdb83f3c06843b2863382c0afd14c7b25d658883b6f

Anyone can re-verify with the zanii SDK (Python or TypeScript): receipt signature → delegation chain → scope → Merkle inclusion → STH signature. No trust in this server required.

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