Verifiable receipt b83f3e93 - secondary_receipt result | Zambo

Verifiable receipt for a secondary_receipt call on Zambo: {"receipt_type":"secondary","id":"e81f78a4-84fc-48b9-af62-fa77b52550b0","hash_algorithm":"sha256","can

Observed result

{"receipt_type":"secondary","id":"e81f78a4-84fc-48b9-af62-fa77b52550b0","hash_algorithm":"sha256","canonical_bytes":"eyJ0ZXh0IjoiTmlnaHRseSB2ZXJpZnkgc3dlZXAgYWNjZXB0YW5jZSB0ZXN0IOKAlCB3ZWFrLW9ubHkgZXZpZGVuY2UifQ==","canonical_byte_length":70,"output_hash":"sha256:ab085dcda23e75c8f7882d93642bd585e8eca548a7ece1a2c3022f6bc740bfac","submitted_at":"2026-10-03T06:10:12.713Z","submitter":"anonymous","claims":{},"evidence_breakdown":[{"type":"screenshot","tier":"weak","description":"Acceptance-test screenshot (weak-only)","check":"unverifiable","claim":"Acceptance-test screenshot (weak-only)"}],"gaps":[],"score":0,"scoring_function":"v1","audit_url":"https://zambo.dev/receipts/e81f78a4-84fc-48b9-af62-fa77b52550b0","disclaimer":"Zambo did not witness the original work. This receipt records evidence submitted at submitted_at and the results of the checks described. claimed_completed_at is submitter-asserted, not verified."}

Verify this receipt

This is a verifiable receipt: the result above is hashed and timestamped at a permanent URL.

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?

An AI agent completed a tool call through Zambo, and this page records the result. The SHA-256 hash below fingerprints exactly what the agent produced. The timestamp shows when it ran. The Nostr anchor posts that fingerprint to public relays, so the record exists outside Zambo too. Check the hash yourself.

What is an execution receipt?

An execution receipt is the public record of one completed AI agent tool call. Read the canonical definition of an AI agent execution receipt.

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Verification checks

Integrity check: Recomputable from canonical bytes
Issued by zambo.dev: Served from the zambo.dev receipt store
Chain valid: Receipt hash chain is internally consistent
Recorded in the immutable log: 2026-10-03T06:10:12.773Z

Proof of observed execution

EXECUTED BY ZAMBO

Receipt ID: b83f3e93-fe5f-4799-bdcd-b69d2416d012
SHA-256 output hash: sha256:9c5df04da541f619a7465903c1636ec4d86c4c3558318b6b28a374d11b0b09d9
Canonical bytes: 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
Timestamp: 2026-10-03T06:10:12.773Z

Bound call context

Receipt schema: 0.3
Tool name: secondary_receipt
Tool version: 4.0.0
Permission scope: public
Caller type: anonymous
Caller ID: sha256:1bc33b5c69bb2c54fd97c092a30474b190df33603e2724c3cf87f0ad80d58ba3
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: 4e72cd170c4b0d081896cc3806f1b451b14d5859d4cca0a0fee66551c257e7d8
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":"2026-10-03T06:10:12.758Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:9c5df04da541f619a7465903c1636ec4d86c4c3558318b6b28a374d11b0b09d9","receipt_uuid":"b83f3e93-fe5f-4799-bdcd-b69d2416d012","schema_version":"zambo-receipt-anchor/1"}

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

Check this hash yourself

Open the verification endpoint. The server recomputes the SHA-256 from the stored bytes and answers verified:true. If it does not say verified, do not trust this page. 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/b83f3e93-fe5f-4799-bdcd-b69d2416d012/badge.svg)](https://zambo.dev/run/b83f3e93-fe5f-4799-bdcd-b69d2416d012)

HTML

<a href="https://zambo.dev/run/b83f3e93-fe5f-4799-bdcd-b69d2416d012"><img src="https://zambo.dev/api/receipt/b83f3e93-fe5f-4799-bdcd-b69d2416d012/badge.svg" alt="Verifiable Zambo receipt"></a>

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Secondary receipt

Score: 0/10 (v1)
Submitted at: 2026-10-03T06:10:12.713Z
Claimed completed at: Not provided. Never independently verified.

Zambo did not witness the original work. This receipt records evidence submitted at submitted_at and the results of the checks described. claimed_completed_at is submitter-asserted, not verified.

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