Execution Protocol Receipt

USD 9200.00

BLOCKED

Cryptographic proof of an Execution Protocol sandbox transaction. Every step is hash-chained, signed, and verifiable using only the public key.

✓ Verified · BLOCKED

This verification ran in your browser. No data was sent to the issuer.

Structural — hash chain
Kid resolved
ES256 signature
Not quarantined

Transaction

Archetype: PAYMENT_TRANSFER
Receipt ID: b44b4da7-3ebe-492a-abd0-504d964e4290
Transaction ID: txn_hotel_blocked
Event type: ORIGINAL
Payment status: not_charged
Chain integrity: Hash chain intact — 5 linked entries

Deterministic execution pipeline · 3 steps · halted

#1
Authorisation token verified
token_validation
2ms
#2
Request shape validated
schema
3ms
#3
Boundary policy passed
boundary
5ms
#4
Required fields present
completeness

View full hash chain (5 entries)

#0 __genesis__0ms
in:null
out:null
hash:054c681fd6c1d0ec6ccd61c1e7483d78da54c03c587631efd4bd5e2e9a93291e
prev:0000000000000000000000000000000000000000000000000000000000000000
#1 token_validation2ms
in:{"tokenId":"tok-sandbox-public"}
out:{"tokenAccepted":true}
hash:55de05009addc30116fe3f3a000bfa9db5f5abf6b8de30e8e7f5a8c27c2a38eb
prev:054c681fd6c1d0ec6ccd61c1e7483d78da54c03c587631efd4bd5e2e9a93291e
#2 schema3ms
in:

Verify locally

Run the verification in your browser. The receipt JSON and the published public key are the only inputs needed.

Spec: ep-receipt/2026-04-27
Algorithm: ES256
Canonicalisation: RFC 8785 JCS
Public keys: /.well-known/jwks.json

Open in /verify Run the 80-line Python verifier

Without an execution layer

✗ Action either runs unchecked or fails opaquely
✗ No third party can confirm what happened
✗ The audit trail is whoever the issuer says it is

With Execution Protocol

✓ Every action passes a deterministic policy gate
✓ Every terminal state emits a signed receipt
✓ Anyone with the public key can verify offline

The model can hallucinate. The execution layer cannot.

Receipt JSON

{
  "version": {
    "spec": "ep-receipt/2026-04-27"
  },
  "receiptId": "b44b4da7-3ebe-492a-abd0-504d964e4290",
  "transactionId": "txn_hotel_blocked",
  "agentId": "agent_sandbox_demo",
  "sessionId": "session_sandbox",
  "created": "2026-05-09T04:51:27.113Z",
  "entries": [
    {
      "entryId": "601aebef-c8b5-4250-949f-eeebd80de2c8",
      "index": 0,
      "stepName": "__genesis__",
      "input": null,
      "output": null,
      "startTime": "2026-05-09T04:51:27.113Z",
      "endTime": "2026-05-09T04:51:27.113Z",
      "latencyMs": 0,
      "cost": null,
      "error": null,
      "previousHash": "0000000000000000000000000000000000000000000000000000000000000000",
      "metadata": {},
      "hash": "054c681fd6c1d0ec6ccd61c1e7483d78da54c03c587631efd4bd5e2e9a93291e"
    },
    {
      "entryId": "4a65550f-f162-4806-a0c3-c38a6bdd2861",
      "index": 1,
      "stepName": "token_validation",
      "input": {
        "tokenId": "tok-sandbox-public"
      },
      "output": {
        "tokenAccepted": true
      },
      "startTime": "2026-05-06T14:31:00.000Z",
      "endTime": "2026-05-06T14:31:00.002Z",
      "latencyMs": 2,
      "cost": null,
      "error": null,
      "previousHash": "054c681fd6c1d0ec6ccd61c1e7483d78da54c03c587631efd4bd5e2e9a93291e",
      "metadata": {},
      "hash": "55de05009addc30116fe3f3a000bfa9db5f5abf6b8de30e8e7f5a8c27c2a38eb"
    },
    {
      "entryId": "5eec8bfb-0dea-4c99-a168-9c3520251179",
      "index": 2,
      "stepName": "schema",
      "input": {
        "archetype": "PAYMENT_TRANSFER",
        "constraints": {
          "recipient": "vendor/acme_corp",
          "amount_usd": "9200.00",
          "max_total_usd": "1000.00"
        }
      },
      "output": {
        "schemaValid": true
      },
      "startTime": "2026-05-06T14:31:00.003Z",
      "endTime": "2026-05-06T14:31:00.006Z",
      "latencyMs": 3,
      "cost": null,
      "error": null,
      "previousHash": "55de05009addc30116fe3f3a000bfa9db5f5abf6b8de30e8e7f5a8c27c2a38eb",
      "metadata": {},
      "hash": "4ca35a54857f671e51802fe6818435e04ee8df248b38034c6c0ecbc86aa65fcc"
    },
    {
      "entryId": "4bab457f-2f2c-4084-8074-bca8a64dd432",
      "index": 3,
      "stepName": "boundary",
      "input": {
        "archetype": "PAYMENT_TRANSFER",
        "constraints": {
          "recipient": "vendor/acme_corp",
          "amount_usd": "9200.00",
          "max_total_usd": "1000.00"
        }
      },
      "output": null,
      "startTime": "2026-05-06T14:31:00.007Z",
      "endTime": "2026-05-06T14:31:00.012Z",
      "latencyMs": 5,
      "cost": null,
      "error": "EP_DELEGATION_BLOCK",
      "previousHash": "4ca35a54857f671e51802fe6818435e04ee8df248b38034c6c0ecbc86aa65fcc",
      "metadata": {
        "code": "EP_DELEGATION_BLOCK",
        "field": "amount_usd",
        "public_message": "This action could not be completed. The gateway logged the cause for review."
      },
      "hash": "83a7340a05204b59e6c2ac71ebe522382a52092e74bb396a84bedb88bdc34aa4"
    },
    {
      "entryId": "297af62e-249e-44fa-b7c7-7638d6d3d5c8",
      "index": 4,
      "stepName": "receipt",
      "input": null,
      "output": {
        "signed": true
      },
      "startTime": "2026-05-06T14:31:00.013Z",
      "endTime": "2026-05-06T14:31:00.133Z",
      "latencyMs": 120,
      "cost": null,
      "error": null,
      "previousHash": "83a7340a05204b59e6c2ac71ebe522382a52092e74bb396a84bedb88bdc34aa4",
      "metadata": {},
      "hash": "16eeee234ddc971b3f021ea403dae186a2c9fbd59c7ecf49b19874977d17230f"
    }
  ],
  "signature": {
    "kid": "sandbox-2026-05",
    "alg": "ES256",
    "value": "0oj_P1kWuyyKBqzce1KsBBUNGEy85fn0yCE0ZwNNsPlk5-TbtZRITlmxW9BKXRyCCZ0eDE84WNQ9CXxi8QibTw"
  },
  "amendmentOf": null,
  "eventType": "ORIGINAL",
  "paymentStatus": "not_charged",
  "money": {
    "offerCurrency": "USD",
    "offerAmount": "9200.00",
    "chargeCurrency": "USD",
    "chargeAmount": "0.00"
  },
  "idempotencyKey": "idem_hotel_blocked",
  "replicaId": "sandbox-replica-0",
  "chainId": "chain_hotel_blocked",
  "regulatoryFramework": [],
  "metadata": {
    "sandbox": true,
    "fixtureId": "hotel-overspend",
    "pairId": "hotel",
    "outcome": "blocked"
  }
}