Public work receipt · checkable record

Receipt publication · saved and checkable

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

Sent using Zambo

Saved:
What ran: receipt_publication
Job summary: Redacted publication copy; original commitment preserved.

Zambo is the verifiable work layer for AI.

Observed result

schema: zambo.redacted-receipt-publication/1 redacted projection: true source receipt id: b69015c3-9825-4981-ba42-d3d378381faf source output hash: sha256:e4a4f7270be2bb5008431449148ddab9bf85f1bf4734825c4c6b0d48d8346ec3 source tool: zambo_check 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: {"status":"uncertain","confidence":"medium","reason":"The operation is claimed or observed, not independently verified.","evidence":[{"id":"http_1bedc984588d","kind":"http_observation","source":"https://zambo.dev/verify/","observed":"Public endpoint responded with HTTP 200.","scope":"reachability, response metadata, page title/description, and content hash","fetched_at":"2026-10-03T10:15:40.486Z","http_status":200,"content_type":"text/html; charset=utf-8","sha256":"8486efb98b266d82b8219db8381f029dae519ee6f71862cecb8e5d1a9e31bff9"},{"id":"observed_0e297adcd439","kind":"execution_receipt","observed":"The supplied context indicates the operation was observed, but does not establish independent verification.","scope":"host-reported execution state"}],"assertion_state":{"claimed":false,"observed":true,"verified":false,"scope":"not independently verified"},"freshness":{"checked_at":"2026-10-03T10:15:40.519Z","source_count":1,"newest_source_at":"2026-10-03T10:15:40.486Z"},"conflicts":[],"risk":{"level":"high","side_effects":true,"reversible":"[private]","approval_required":true,"reasons":["The request concerns an external action or execution; Zambo does not authorize it from a natural-language request alone."]},"provenance":{"method":"deterministic observations plus caller-supplied context","sources":["https://zambo.dev/verify/"],"limitations":["A reachable source is not proof that its claims are true.","Caller-supplied claimed/verified fields are not independently authenticated."]},"recommended_action":"verify_more","next_action":"verify","proof":{"type":"integrity_hash","hash":"f0d194fb6be7031510c6106776aa6a5c8a67029f964a42dc23227a6dd062190b","recorded_at":"2026-10-03T10:15:40.519Z","scope":"integrity of this check response and its observed evidence; not a universal truth certificate","independently_verifiable":false,"note":"This hash is not a persisted proof certificate. Use the dedicated proof capability only when a durable certificate is explicitly requested."},"next_capability":"zambo_check","zambo":{"capability":"zambo_check","next_capability":"zambo_check","mcp_available":true},"meta":{"check_type":"execution","latency_ms":33,"tool_calls":0,"upstream_latency_ms":33,"cache_hit":false,"free_limit":"20/day/IP"}}

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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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: 2026-11-08T10:08:19.258Z; 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
77be0faf-3a4e-53d1-aa59-f0eacd9c2e30
SHA-256 output hash
sha256:6736ad0691586f12f67e1e4eaffa09e92ee69db97a8ab5f0b6ab7b1fea0a98b8
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:ba71e40b40f22592fc0e9800869573f1943445f9278a4cb4a7721f47f7f79915
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
17e2195754e149334d9eda2ef61d693ad52bd70d6e5b27ac144bcc63e5dce9fa
Anchor status
published
Public key
e13475107d30c918ec664adf2ab1141024a22fb35190f82c9e933704fa49af41

Relay hints: wss://relay.primal.net

Schema: zambo-receipt-anchor/1

Anchor envelope bytes:

{"anchored_at":"2026-11-08T10:08:19.258Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:6736ad0691586f12f67e1e4eaffa09e92ee69db97a8ab5f0b6ab7b1fea0a98b8","receipt_uuid":"77be0faf-3a4e-53d1-aa59-f0eacd9c2e30","schema_version":"zambo-receipt-anchor/1"}

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

Relay publication is separate from receipt integrity. When the original signed event is available, Zambo retries pending, partial, or failed anchors about once a minute. Relay acknowledgements are external, so there is no guaranteed completion time; the receipt remains checkable from its saved bytes and verification link.

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/77be0faf-3a4e-53d1-aa59-f0eacd9c2e30/badge.svg)](https://zambo.dev/run/77be0faf-3a4e-53d1-aa59-f0eacd9c2e30?ref=badge)

HTML

<a href="https://zambo.dev/run/77be0faf-3a4e-53d1-aa59-f0eacd9c2e30?ref=badge"><img src="https://zambo.dev/api/receipt/77be0faf-3a4e-53d1-aa59-f0eacd9c2e30/badge.svg" alt="Verifiable Zambo receipt"></a>

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