Receipt publication · saved and checkable

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 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.

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: 2026-11-07T10:22:23.865Z; external immutability is not checked

Committed provenance claim

LOGGED BY AGENT

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

Receipt ID

78c05b2a-7abd-52da-af05-93978dbba77c

SHA-256 output hash

sha256:238cd1896e8469e977e8849e834a0bb4e349a3faeccd974f237487312f329f8b

Canonical bytes

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

Timestamp

2026-11-07T10:22:23.865Z

Bound call context

Receipt schema

0.4

Tool name

receipt_publication

Tool version

4.0.0

Permission scope

public

Caller type

session

Caller ID

sha256:8cac2a8b030a3f7b74c95e3f09e4368c4aa40524de6d49fef6424fe2fb52a994

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

52a4f0cd68e5a99c4918cf388ccbc7e54bb3a06a97e131337304a256396f9a1f

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":"2026-11-07T10:22:23.865Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:238cd1896e8469e977e8849e834a0bb4e349a3faeccd974f237487312f329f8b","receipt_uuid":"78c05b2a-7abd-52da-af05-93978dbba77c","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.