Verifiable receipt a20d12dc - receipt_publication result | Zambo

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

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

Zambo is the verifiable work layer for AI.

Zambo is the verifiable work layer for AI. Verifiable receipt for a receipt_publication call on Zambo: {"schema":"zambo.redacted-receipt-publication/1","redacted_projection":true,"source_receipt_id":"398

Observed result

schema: zambo.redacted-receipt-publication/1 redacted projection: true source receipt id: 39859518-dc48-46c1-8f20-9691b7923978 source output hash: sha256:441a5a58be992ca697dfcb000b1cc1fbb093e7736fbc0c2e10c6c93a298f21b9 source tool: handover 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: {"handover_id":"5be55115-75bf-403d-b890-7698c6af91dc","url":"https://zambo.dev/handover/5be55115-75bf-403d-b890-7698c6af91dc","reused":false,"share_text":"Here's the handover for TEST handover audit 1016d: https://zambo.dev/handover/5be55115-75bf-403d-b890-7698c6af91dc. Each listed step has a verifiable receipt you can check in your browser.","workflow_receipt_url":"https://zambo.dev/run/c0c4ffc3-be5f-4ad1-8a42-770709bc1f2b","verify_url":"https://zambo.dev/api/v2/receipt/c0c4ffc3-be5f-4ad1-8a42-770709bc1f2b/verify","steps":2,"ais":["TEST-Client-1016d","Unspecified AI"],"not_checked":[],"shield":"pass","visibility":"public","redactions":0,"owner_url":"https://zambo.dev/handover/5be55115-75bf-403d-b890-7698c6af91dc","next":["Send the link to TEST-recipient-1016d","See it as your client will: https://zambo.dev/handover/5be55115-75bf-403d-b890-7698c6af91dc?preview=client","Make it private and branded with Zambo Pass: https://zambo.dev/upgrade?tier=monthly"]}

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: 2026-10-19T10:10:22.325Z; external immutability is not checked

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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"}}}

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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
a20d12dc-72e2-5402-a78d-85402d7d107c
SHA-256 output hash
sha256:8b300b0d296b8adedb8f9dfbe322e8dc6ab13b7ef336ae1e0124595d5e74c677
Canonical bytes
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
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:b904cdaf3658be71eb58491fd762c983d899068c753129c49514463ccbfcc54a
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
no_upstream_bytes_captured
Evidence SHA-256
unavailable
Byte length
unavailable

Neutral Nostr anchor

Event ID
328441541a41fede46a46cdac3d9682d252099c62e103011dc4d2a44605817bf
Anchor status
published
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":"2026-10-19T10:10:22.325Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:8b300b0d296b8adedb8f9dfbe322e8dc6ab13b7ef336ae1e0124595d5e74c677","receipt_uuid":"a20d12dc-72e2-5402-a78d-85402d7d107c","schema_version":"zambo-receipt-anchor/1"}

Anchor status "published": Published to all configured relay targets.

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/a20d12dc-72e2-5402-a78d-85402d7d107c/badge.svg)](https://zambo.dev/run/a20d12dc-72e2-5402-a78d-85402d7d107c?ref=badge)

HTML

<a href="https://zambo.dev/run/a20d12dc-72e2-5402-a78d-85402d7d107c?ref=badge"><img src="https://zambo.dev/api/receipt/a20d12dc-72e2-5402-a78d-85402d7d107c/badge.svg" alt="Verifiable Zambo receipt"></a>

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