Verifiable receipt 8b89f1c6 - capability_search result | Zambo

Verifiable receipt for a capability_search call on Zambo: {"query":"verify ai agent work receipt","status":"execution_plan","execution_plan":[{"step":1,"product

Observed result

{"query":"verify ai agent work receipt","status":"execution_plan","execution_plan":[{"step":1,"product":"Zambo Check","classification":"fully_executable_in_chat","tool":"zambo_check","callable":"zambo_check({check: \"verify ai agent work receipt\"})","required_arguments":["check"],"why_relevant":"This is a verification, evidence, freshness, conflict, completion, or preflight intent.","when_to_use":["before trusting uncertain information","before using a third-party tool","before consequential actions","before claiming a task completed","after an execution when evidence needs checking"],"expected_output":{"status":"verified|uncertain|contradicted|unsafe|stale|incomplete","confidence":"high|medium|low|none","reason":"string","evidence":"object[]","assertion_state":"object{claimed,observed,verified,scope}","freshness":"object{checked_at,source_count,newest_source_at}","conflicts":"object[]","risk":"object","provenance":"object","recommended_action":"string","next_action":"string","next_capability":"string|null","proof":"object"},"approval_required":false,"retry_safe":true,"access":{"free_tier":"unlimited","paid":"included in Zambo Pass","per_call":"free"},"input_hints":{"type":"object","properties":{"check":{"oneOf":[{"type":"string"},{"type":"object"}],"description":"What should be checked? Natural language or a structured check object."},"context":{"oneOf":[{"type":"string"},{"type":"object"}],"description":"Optional evidence, source URLs, run/receipt metadata, claims, or an output value/schema."},"type":{"type":"string","enum":["auto","truth","freshness","provenance","conflict","tool","action","authorization","execution","completion","output","security"],"description":"Deterministic check route. Defaults to auto."},"url":{"type":"string","description":"Legacy project URL check. Also accepted as a source URL for universal checks."},"github":{"type":"string","description":"Legacy optional GitHub repo URL for visible code/repository signals."},"email":{"type":"string","description":"Optional Zambo Pass email for unlimited checks."},"_caller_label":{"type":"string","maxLength":80,"description":"Optional self-reported caller label. It is recorded as a claim, not independently verified."}},"required":[]}}],"next_step":"If the check says execution is appropriate, call zambo_universal with the original outcome and one stable _session_id; verify the receipt afterward.","mcp_url":"https://zambo.dev/api/mcp"}

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

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This record shows the result and timestamp stored for the call. Recompute the SHA-256 commitment from the saved bytes in your browser; signatures and chain proofs are not checked.

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?

Zambo's receipt store reports a tool call and records its result. The SHA-256 commitment covers the exact canonical bytes. The provenance label is bound to v0.4 receipt bytes when that check passes, but no pinned signature or trusted issuer key is checked. An anchor can timestamp a fingerprint; it does not authenticate the issuer.

What is an execution receipt?

An execution receipt is a public record of a reported AI agent tool call. Its byte commitment and provenance claim can be checked independently; neither alone authenticates the issuer. Read the canonical definition of an AI agent execution receipt.

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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: 2026-10-13T11:12:15.529Z; external immutability is not checked

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Committed provenance claim

EXECUTED BY ZAMBO

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

Receipt ID: 8b89f1c6-819c-4d57-8ce5-ff34aa26a04c
SHA-256 output hash: sha256:d897ca603fec497b3984fd430681328883bf24a5cf1b2cde0845e96cac4ddc77
Canonical bytes: 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
Timestamp: 2026-10-13T11:12:15.529Z

Bound call context

Receipt schema: 0.4
Tool name: capability_search
Tool version: 4.0.0
Permission scope: public
Caller type: anonymous
Caller ID: sha256:a7d4cc787132b66dd0d3e404228a16036d778bc48e4536b9c4c41d32ae7957b4
Caller basis: ip_ua_30d
Caller rotates at: 2026-11-03T00:00:00.000Z
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: 5d968a42f2580c959285e4a0cf0fcbfa487580e5c054a1b94d9ecc46d06d1676
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":"2026-10-13T11:12:15.529Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:d897ca603fec497b3984fd430681328883bf24a5cf1b2cde0845e96cac4ddc77","receipt_uuid":"8b89f1c6-819c-4d57-8ce5-ff34aa26a04c","schema_version":"zambo-receipt-anchor/1"}

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

Check this hash yourself

API v2 status: verified. This status summarizes the v2 commitment and provenance checks; it does not prove 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

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HTML

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