Handover submission · 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: 2026-10-30T17:35:10.946Z; 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

67b04dda-0ffc-4494-822b-151bf2e48a6a

SHA-256 output hash

sha256:726c024fef1b0799a425accd45c76ec1c5dd7fbd876e7380f753bdfd8892080b

Canonical bytes

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

Timestamp

2026-10-30T17:35:10.946Z

Bound call context

Receipt schema

0.4

Tool name

handover_submission

Tool version

4.0.0

Permission scope

public

Caller type

session

Caller ID

sha256:b5cf44c8af34eedbcbe7496441ec9d372a8529805d586cf97235919b587e6892

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

2c2ad3d38055ef0a4d9bb3fadfc88495b2ad95ac798848f9da75418d2b52a437

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":"2026-10-30T17:35:10.946Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:726c024fef1b0799a425accd45c76ec1c5dd7fbd876e7380f753bdfd8892080b","receipt_uuid":"67b04dda-0ffc-4494-822b-151bf2e48a6a","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.