Verifiable receipt 8900d62b - 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":"700

Observed result

schema: zambo.redacted-receipt-publication/1 redacted projection: true source receipt id: 700c4a9c-f0b6-41bb-b6ec-244c6014644a source output hash: sha256:e3a5fed91549ce830cee68ce9d96436dcb1175b9c1d160051679daf1e734e51b 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":"incomplete","confidence":"low","reason":"No run ID, receipt, proof, or observed result was supplied, so completion cannot be confirmed.","evidence":[],"assertion_state":{"claimed":false,"observed":false,"verified":false,"scope":"not independently verified"},"freshness":{"checked_at":"2026-10-07T13:45:42.687Z","source_count":0,"newest_source_at":null},"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":[],"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":"0fa017a545f411bca6275feb3a4507e8de215e8091e5e4b7d6787351f27676db","recorded_at":"2026-10-07T13:45:42.687Z","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":0,"tool_calls":0,"upstream_latency_ms":0,"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: 2026-10-19T18:22:52.815Z; external immutability is not checked

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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
8900d62b-a109-566e-a170-cb258e11ec91
SHA-256 output hash
sha256:87801a6daf150bb1586bae2f0a1259d327e612d6923c985693e7aa90646ac0a5
Canonical bytes
eyJjYWxsZXIiOnsiaWQiOiJzaGEyNTY6YWMzNTBiMjlhNDdlM2Q0ODFhMDEyMTdmNDEyZWVkYzhiZmY3NGVjOGIxMjNkZGRkNzg2NjRlMTM5OTI0MzI0ZiIsInR5cGUiOiJzZXNzaW9uIn0sImlzc3Vlcl9jbGFpbXMiOnsicHJvdmVuYW5jZV9jbGFzcyI6IkxPR0dFRCBCWSBBR0VOVCJ9LCJvdXRwdXQiOnsib3V0cHV0Ijoie1wic3RhdHVzXCI6XCJpbmNvbXBsZXRlXCIsXCJjb25maWRlbmNlXCI6XCJsb3dcIixcInJlYXNvblwiOlwiTm8gcnVuIElELCByZWNlaXB0LCBwcm9vZiwgb3Igb2JzZXJ2ZWQgcmVzdWx0IHdhcyBzdXBwbGllZCwgc28gY29tcGxldGlvbiBjYW5ub3QgYmUgY29uZmlybWVkLlwiLFwiZXZpZGVuY2VcIjpbXSxcImFzc2VydGlvbl9zdGF0ZVwiOntcImNsYWltZWRcIjpmYWxzZSxcIm9ic2VydmVkXCI6ZmFsc2UsXCJ2ZXJpZmllZFwiOmZhbHNlLFwic2NvcGVcIjpcIm5vdCBpbmRlcGVuZGVudGx5IHZlcmlmaWVkXCJ9LFwiZnJlc2huZXNzXCI6e1wiY2hlY2tlZF9hdFwiOlwiMjAyNi0xMC0wN1QxMzo0NTo0Mi42ODdaXCIsXCJzb3VyY2VfY291bnRcIjowLFwibmV3ZXN0X3NvdXJjZV9hdFwiOm51bGx9LFwiY29uZmxpY3RzXCI6W10sXCJyaXNrXCI6e1wibGV2ZWxcIjpcImhpZ2hcIixcInNpZGVfZWZmZWN0c1wiOnRydWUsXCJyZXZlcnNpYmxlXCI6XCJbcHJpdmF0ZV1cIixcImFwcHJvdmFsX3JlcXVpcmVkXCI6dHJ1ZSxcInJlYXNvbnNcIjpbXCJUaGUgcmVxdWVzdCBjb25jZXJucyBhbiBleHRlcm5hbCBhY3Rpb24gb3IgZXhlY3V0aW9uOyBaYW1ibyBkb2VzIG5vdCBhdXRob3JpemUgaXQgZnJvbSBhIG5hdHVyYWwtbGFuZ3VhZ2UgcmVxdWVzdCBhbG9uZS5cIl19LFwicHJvdmVuYW5jZVwiOntcIm1ldGhvZFwiOlwiZGV0ZXJtaW5pc3RpYyBvYnNlcnZhdGlvbnMgcGx1cyBjYWxsZXItc3VwcGxpZWQgY29udGV4dFwiLFwic291cmNlc1wiOltdLFwibGltaXRhdGlvbnNcIjpbXCJBIHJlYWNoYWJsZSBzb3VyY2UgaXMgbm90IHByb29mIHRoYXQgaXRzIGNsYWltcyBhcmUgdHJ1ZS5cIixcIkNhbGxlci1zdXBwbGllZCBjbGFpbWVkL3ZlcmlmaWVkIGZpZWxkcyBhcmUgbm90IGluZGVwZW5kZW50bHkgYXV0aGVudGljYXRlZC5cIl19LFwicmVjb21tZW5kZWRfYWN0aW9uXCI6XCJ2ZXJpZnlfbW9yZVwiLFwibmV4dF9hY3Rpb25cIjpcInZlcmlmeVwiLFwicHJvb2ZcIjp7XCJ0eXBlXCI6XCJpbnRlZ3JpdHlfaGFzaFwiLFwiaGFzaFwiOlwiMGZhMDE3YTU0NWY0MTFiY2E2Mjc1ZmViM2E0NTA3ZThkZTIxNWU4MDkxZTVlNGI3ZDY3ODczNTFmMjc2NzZkYlwiLFwicmVjb3JkZWRfYXRcIjpcIjIwMjYtMTAtMDdUMTM6NDU6NDIuNjg3WlwiLFwic2NvcGVcIjpcImludGVncml0eSBvZiB0aGlzIGNoZWNrIHJlc3BvbnNlIGFuZCBpdHMgb2JzZXJ2ZWQgZXZpZGVuY2U7IG5vdCBhIHVuaXZlcnNhbCB0cnV0aCBjZXJ0aWZpY2F0ZVwiLFwiaW5kZXBlbmRlbnRseV92ZXJpZmlhYmxlXCI6ZmFsc2UsXCJub3RlXCI6XCJUaGlzIGhhc2ggaXMgbm90IGEgcGVyc2lzdGVkIHByb29mIGNlcnRpZmljYXRlLiBVc2UgdGhlIGRlZGljYXRlZCBwcm9vZiBjYXBhYmlsaXR5IG9ubHkgd2hlbiBhIGR1cmFibGUgY2VydGlmaWNhdGUgaXMgZXhwbGljaXRseSByZXF1ZXN0ZWQuXCJ9LFwibmV4dF9jYXBhYmlsaXR5XCI6XCJ6YW1ib19jaGVja1wiLFwiemFtYm9cIjp7XCJjYXBhYmlsaXR5XCI6XCJ6YW1ib19jaGVja1wiLFwibmV4dF9jYXBhYmlsaXR5XCI6XCJ6YW1ib19jaGVja1wiLFwibWNwX2F2YWlsYWJsZVwiOnRydWV9LFwibWV0YVwiOntcImNoZWNrX3R5cGVcIjpcImV4ZWN1dGlvblwiLFwibGF0ZW5jeV9tc1wiOjAsXCJ0b29sX2NhbGxzXCI6MCxcInVwc3RyZWFtX2xhdGVuY3lfbXNcIjowLFwiY2FjaGVfaGl0XCI6ZmFsc2UsXCJmcmVlX2xpbWl0XCI6XCIyMC9kYXkvSVBcIn19IiwicHVibGljYXRpb25fbm90aWNlIjoiVGhpcyBpcyBhIG5ld2x5IGNvbW1pdHRlZCByZWRhY3RlZCBwdWJsaWNhdGlvbiBjb3B5LCBub3QgdGhlIG9yaWdpbmFsIHRvb2wgb3V0cHV0LiBUaGUgb3JpZ2luYWwgY29tbWl0bWVudCBpcyB1bmNoYW5nZWQgYW5kIGl0cyBwcml2YXRlIGJ5dGVzIGFyZSB3aXRoaGVsZC4iLCJyZWRhY3RlZF9wcm9qZWN0aW9uIjp0cnVlLCJzY2hlbWEiOiJ6YW1iby5yZWRhY3RlZC1yZWNlaXB0LXB1YmxpY2F0aW9uLzEiLCJzb3VyY2Vfb3V0cHV0X2hhc2giOiJzaGEyNTY6ZTNhNWZlZDkxNTQ5Y2U4MzBjZWU2OGNlOWQ5NjQzNmRjYjExNzViOWMxZDE2MDA1MTY3OWRhZjFlNzM0ZTUxYiIsInNvdXJjZV9yZWNlaXB0X2lkIjoiNzAwYzRhOWMtZjBiNi00MWJiLWI2ZWMtMjQ0YzYwMTQ2NDRhIiwic291cmNlX3Rvb2wiOiJ6YW1ib19jaGVjayJ9LCJyZWNlaXB0X3NjaGVtYV92ZXJzaW9uIjoiMC40Iiwic2lkZV9lZmZlY3RzIjp7ImRlY2xhcmF0aW9uX2hhc2giOiJzaGEyNTY6NDVhYWQzOGYzYWE5ODJiOWFhZmU5MmVjYjQxNmViZTk4NzkxZWRkYmFmOGFiNmRmMGJkMDg2MDViN2MxYmZlZSIsImRlY2xhcmVkIjpbIm5vbmUiXSwic2NoZW1hX3ZlcnNpb24iOiJ6YW1iby1zaWRlLWVmZmVjdHMvMSJ9LCJ0b29sIjp7Im5hbWUiOiJyZWNlaXB0X3B1YmxpY2F0aW9uIiwic2NvcGUiOiJwdWJsaWMiLCJ2ZXJzaW9uIjoiNC4wLjAifX0=
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:ac350b29a47e3d481a01217f412eedc8bff74ec8b123dddd78664e139924324f
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
5c29bd20a37b89fac57ec8aecf56e79ef633d23d8b986ed799009a2768480127
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":"2026-10-19T18:22:52.815Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:87801a6daf150bb1586bae2f0a1259d327e612d6923c985693e7aa90646ac0a5","receipt_uuid":"8900d62b-a109-566e-a170-cb258e11ec91","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.

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