Public work receipt · checkable record

Receipt publication · saved and checkable

✓ This result hasn’t changed since it was saved.

Sent using Zambo

Saved:
What was asked: The request recorded for this receipt.

Zambo is the verifiable work layer for AI.

Observed result

schema: zambo.redacted-receipt-publication/1 redacted projection: true source receipt id: 432332e0-8ec5-5b76-b2cb-6281bb643d2f source output hash: sha256:6e9ba58b39752eaa34b609e639b3bc2668391ed804e30ad411433c5a0ccbd546 source tool: workflow_receipt publication notice: This is a newly committed redacted publication copy, not the original tool output. The original commitment is unchanged and its private bytes are withheld. output: {"type":"verifiable-workflow-receipt","version":"1","workflow_id":"1f86c970-e974-55f1-8076-5421b6506d24","goal":"Untitled workflow","status":"error","agent":{"framework":null,"model":null},"steps":[{"seq":1,"tool":"zambo_universal","receipt_id":"0968d5ac-2afe-40b6-9884-ccd9cced5e6a","receipt_hash":"d50dabc6b9ae8bdd815d3af589a3cba5264fb799b5dc2bf122e4c168ef386ac2","started_at":"2026-09-25T08:44:13.137Z","ended_at":"2026-09-25T08:44:14.690Z","status":"error"},{"seq":2,"tool":"zambo_universal","receipt_id":"8498689c-3f5e-4889-8c08-c0d7faee4e5d","receipt_hash":"[REDACTED_IDENTIFIER]","started_at":"2026-09-25T08:44:15.925Z","ended_at":"2026-09-25T08:44:17.601Z","status":"error"}],"merkle_root":"2d8577109fc2604c15830994234f7783394f0fd70036c3ea55cc287888951838","rollups":{"step_count":2,"duration_ms":4464,"errors":2,"total_tokens":null},"output_hash":"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855","receipt_id":"432332e0-8ec5-5b76-b2cb-6281bb643d2f","verify_url":"https://zambo.dev/workflow/1f86c970-e974-55f1-8076-5421b6506d24"}

This is the saved result preview, not proof that the answer was correct.

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Show technical provenance details

Provenance for every timeline entry

  • EXECUTED BY ZAMBOZambo ran the tool call itself.
  • OBSERVED VIA GATEWAYA Zambo gateway observed request and response bytes from the named external executor. Zambo did not run that external action.
  • LOGGED BY AGENTAn agent or local hook reported the action. Zambo attests that the record is unchanged since logging, not that the action happened as described.

Private agent reasoning, built-in client actions, and direct calls to unrelated MCP servers are not included unless an agent or gateway reports them.

What is this receipt?

This is a verifiable receipt for a journal entry. It confirms receipt, redaction, timestamping, and chaining. It does not attest to execution.

What the receipt can and cannot prove

What is this?

Zambo's receipt store reports a journal entry from an agent or local hook. The SHA-256 commitment covers the receipt bytes. The provenance label is only a claim, not proof of issuer identity or that the reported action happened.

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This receipt records a completed tool call. When the free allowance is not enough, choose the access path that fits the job.

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Show technical verification checks

Verification checks

  • SHA-256 commitment: Checked independently against the exact decoded bytes
  • Provenance binding: PASS; The metadata claim is consistent with the verified receipt bytes; issuer is not authenticated.
  • Metadata binding: PASS; metadata_hash matches the canonical metadata block.
  • Issuer authentication: NOT CHECKED; no pinned signing key or trusted issuer was supplied
  • Signature: NOT CHECKED; no Ed25519 signature or pinned key is supplied
  • Chain: NOT CHECKED; no append-only chain proof is validated
  • Stored timestamp: 2026-11-07T02:48:58.503Z; external immutability is not checked

Get proof like this from your own AI

Add to my AI ·

Get receipts for your own AI work: add zambo.dev/mcp

One URL, no key. Copy the line for your AI and add it yourself in its settings.

  • ClaudeSettings, Connectors, Add custom connector, paste the URL.
    https://zambo.dev/mcp
  • ChatGPTSettings, Apps and Connectors, developer mode, create a connector with this URL.
    https://zambo.dev/mcp
  • GrokAdd a remote MCP server in your Grok client and paste the URL.
    https://zambo.dev/mcp
  • CursorPaste into ~/.cursor/mcp.json.
    {"mcpServers":{"zambo":{"url":"https://zambo.dev/mcp"}}}

Nothing is installed automatically. Full setup guides

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Show receipt data and verification evidence

Committed provenance claim

LOGGED BY AGENT

The metadata claim is consistent with the verified receipt bytes; issuer is not authenticated.

Receipt ID
27d9db42-218b-5cc4-a16a-10ac4a209073
SHA-256 output hash
sha256:a4471ba5474daea770daebe2d41b0100a18bd674d93ed01486a99c74f2b3a82c
Canonical bytes
eyJjYWxsZXIiOnsiaWQiOiJzaGEyNTY6NWViYzUzN2VlNjE2NmZiZTg0ZGM0Y2IyYjgzYjUxYjZjNDM4NDk5ODhjMGJiOWQyNzMwN2FjNjc0M2M3N2NjMyIsInR5cGUiOiJzZXNzaW9uIn0sImlzc3Vlcl9jbGFpbXMiOnsicHJvdmVuYW5jZV9jbGFzcyI6IkxPR0dFRCBCWSBBR0VOVCJ9LCJvdXRwdXQiOnsib3V0cHV0Ijoie1widHlwZVwiOlwidmVyaWZpYWJsZS13b3JrZmxvdy1yZWNlaXB0XCIsXCJ2ZXJzaW9uXCI6XCIxXCIsXCJ3b3JrZmxvd19pZFwiOlwiMWY4NmM5NzAtZTk3NC01NWYxLTgwNzYtNTQyMWI2NTA2ZDI0XCIsXCJnb2FsXCI6XCJVbnRpdGxlZCB3b3JrZmxvd1wiLFwic3RhdHVzXCI6XCJlcnJvclwiLFwiYWdlbnRcIjp7XCJmcmFtZXdvcmtcIjpudWxsLFwibW9kZWxcIjpudWxsfSxcInN0ZXBzXCI6W3tcInNlcVwiOjEsXCJ0b29sXCI6XCJ6YW1ib191bml2ZXJzYWxcIixcInJlY2VpcHRfaWRcIjpcIjA5NjhkNWFjLTJhZmUtNDBiNi05ODg0LWNjZDljY2VkNWU2YVwiLFwicmVjZWlwdF9oYXNoXCI6XCJkNTBkYWJjNmI5YWU4YmRkODE1ZDNhZjU4OWEzY2JhNTI2NGZiNzk5YjVkYzJiZjEyMmU0YzE2OGVmMzg2YWMyXCIsXCJzdGFydGVkX2F0XCI6XCIyMDI2LTA5LTI1VDA4OjQ0OjEzLjEzN1pcIixcImVuZGVkX2F0XCI6XCIyMDI2LTA5LTI1VDA4OjQ0OjE0LjY5MFpcIixcInN0YXR1c1wiOlwiZXJyb3JcIn0se1wic2VxXCI6MixcInRvb2xcIjpcInphbWJvX3VuaXZlcnNhbFwiLFwicmVjZWlwdF9pZFwiOlwiODQ5ODY4OWMtM2Y1ZS00ODg5LThjMDgtYzBkN2ZhZWU0ZTVkXCIsXCJyZWNlaXB0X2hhc2hcIjpcIjk2MjVmNWNkN2ExNTczMzk2NTZmZGM2MmUyZTljNWE1NmRlZWUzOGQ3NWY3OGQ1YWQ3NjIxYjYyOWJlYjFkYTdcIixcInN0YXJ0ZWRfYXRcIjpcIjIwMjYtMDktMjVUMDg6NDQ6MTUuOTI1WlwiLFwiZW5kZWRfYXRcIjpcIjIwMjYtMDktMjVUMDg6NDQ6MTcuNjAxWlwiLFwic3RhdHVzXCI6XCJlcnJvclwifV0sXCJtZXJrbGVfcm9vdFwiOlwiMmQ4NTc3MTA5ZmMyNjA0YzE1ODMwOTk0MjM0Zjc3ODMzOTRmMGZkNzAwMzZjM2VhNTVjYzI4Nzg4ODk1MTgzOFwiLFwicm9sbHVwc1wiOntcInN0ZXBfY291bnRcIjoyLFwiZHVyYXRpb25fbXNcIjo0NDY0LFwiZXJyb3JzXCI6MixcInRvdGFsX3Rva2Vuc1wiOm51bGx9LFwib3V0cHV0X2hhc2hcIjpcImUzYjBjNDQyOThmYzFjMTQ5YWZiZjRjODk5NmZiOTI0MjdhZTQxZTQ2NDliOTM0Y2E0OTU5OTFiNzg1MmI4NTVcIixcInJlY2VpcHRfaWRcIjpcIjQzMjMzMmUwLThlYzUtNWI3Ni1iMmNiLTYyODFiYjY0M2QyZlwiLFwidmVyaWZ5X3VybFwiOlwiaHR0cHM6Ly96YW1iby5kZXYvd29ya2Zsb3cvMWY4NmM5NzAtZTk3NC01NWYxLTgwNzYtNTQyMWI2NTA2ZDI0XCJ9IiwicHVibGljYXRpb25fbm90aWNlIjoiVGhpcyBpcyBhIG5ld2x5IGNvbW1pdHRlZCByZWRhY3RlZCBwdWJsaWNhdGlvbiBjb3B5LCBub3QgdGhlIG9yaWdpbmFsIHRvb2wgb3V0cHV0LiBUaGUgb3JpZ2luYWwgY29tbWl0bWVudCBpcyB1bmNoYW5nZWQgYW5kIGl0cyBwcml2YXRlIGJ5dGVzIGFyZSB3aXRoaGVsZC4iLCJyZWRhY3RlZF9wcm9qZWN0aW9uIjp0cnVlLCJzY2hlbWEiOiJ6YW1iby5yZWRhY3RlZC1yZWNlaXB0LXB1YmxpY2F0aW9uLzEiLCJzb3VyY2Vfb3V0cHV0X2hhc2giOiJzaGEyNTY6NmU5YmE1OGIzOTc1MmVhYTM0YjYwOWU2MzliM2JjMjY2ODM5MWVkODA0ZTMwYWQ0MTE0MzNjNWEwY2NiZDU0NiIsInNvdXJjZV9yZWNlaXB0X2lkIjoiNDMyMzMyZTAtOGVjNS01Yjc2LWIyY2ItNjI4MWJiNjQzZDJmIiwic291cmNlX3Rvb2wiOiJ3b3JrZmxvd19yZWNlaXB0In0sInJlY2VpcHRfc2NoZW1hX3ZlcnNpb24iOiIwLjQiLCJzaWRlX2VmZmVjdHMiOnsiZGVjbGFyYXRpb25faGFzaCI6InNoYTI1Njo0NWFhZDM4ZjNhYTk4MmI5YWFmZTkyZWNiNDE2ZWJlOTg3OTFlZGRiYWY4YWI2ZGYwYmQwODYwNWI3YzFiZmVlIiwiZGVjbGFyZWQiOlsibm9uZSJdLCJzY2hlbWFfdmVyc2lvbiI6InphbWJvLXNpZGUtZWZmZWN0cy8xIn0sInRvb2wiOnsibmFtZSI6InJlY2VpcHRfcHVibGljYXRpb24iLCJzY29wZSI6InB1YmxpYyIsInZlcnNpb24iOiI0LjAuMCJ9fQ==
Timestamp

Bound call context

Receipt schema
0.4
Tool name
receipt_publication
Tool version
4.0.0
Permission scope
public
Caller type
session
Caller ID
sha256:5ebc537ee6166fbe84dc4cb2b83b51b6c43849988c0bb9d27307ac6743c77cc3
Declared side effects
none
Side-effects schema
zambo-side-effects/1
Declaration hash
sha256:45aad38f3aa982b9aafe92ecb416ebe98791eddbaf8ab6df0bd08605b7c1bfee

This records what the server-side tool contract declared at call time. It does not independently verify that a downstream side effect happened.

Bound upstream evidence

Status
empty
Evidence SHA-256
unavailable
Byte length
unavailable

Neutral Nostr anchor

Event ID
9259e1920f4d1f2d2bcde6ad3bfb460522461b48baede1baff8079a8e07e7569
Anchor status
partial
Public key
e13475107d30c918ec664adf2ab1141024a22fb35190f82c9e933704fa49af41

Relay hints: wss://relay.damus.io · wss://nos.lol · wss://relay.primal.net

Schema: zambo-receipt-anchor/1

Anchor envelope bytes:

{"anchored_at":"2026-11-07T02:48:58.503Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:a4471ba5474daea770daebe2d41b0100a18bd674d93ed01486a99c74f2b3a82c","receipt_uuid":"27d9db42-218b-5cc4-a16a-10ac4a209073","schema_version":"zambo-receipt-anchor/1"}

Anchor status "partial": Published to some configured relay targets; publication was not confirmed by every configured relay.

Check this hash yourself

Receipt commitment: commitment matched; issuer, signature and chain not checked. This checks the saved bytes, not whether the answer was correct. Recompute the SHA-256 commitment in your browser. Open the API v2 JSON response to inspect the machine-readable checks. See the Nostr anchor event on a public viewer. The fingerprint is timestamped outside Zambo too.

Embed this receipt

Markdown

[![Verifiable Zambo receipt](https://zambo.dev/api/receipt/27d9db42-218b-5cc4-a16a-10ac4a209073/badge.svg)](https://zambo.dev/run/27d9db42-218b-5cc4-a16a-10ac4a209073?ref=badge)

HTML

<a href="https://zambo.dev/run/27d9db42-218b-5cc4-a16a-10ac4a209073?ref=badge"><img src="https://zambo.dev/api/receipt/27d9db42-218b-5cc4-a16a-10ac4a209073/badge.svg" alt="Verifiable Zambo receipt"></a>

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