Verifiable receipt 84243a77 - handover_submission result | Zambo

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: 2026-10-18T23:38:32.743Z; 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

84243a77-811b-4f5e-8438-99a37f9b43be

SHA-256 output hash

sha256:2867dfadc574d23864ba12d78253e0fdad39f65ef773e56346894e88558bad07

Canonical bytes

eyJjYWxsZXIiOnsiaWQiOiJzaGEyNTY6NTZiODhlMGNjOWRjNDNhMTE0ZmM3MTk5Mjk0MDVkYjQ0NmZiNTZkZjg2MDcyN2NiOTVlOTIyMmZjZGY5MzkzOSIsInR5cGUiOiJzZXNzaW9uIn0sImlzc3Vlcl9jbGFpbXMiOnsicHJvdmVuYW5jZV9jbGFzcyI6IkxPR0dFRCBCWSBBR0VOVCJ9LCJvdXRwdXQiOnsiY2xhaW0iOiJTdXBwbGllZCB3b3JrLCBub3QgaW5kZXBlbmRlbnRseSBjaGVja2VkLiIsImRlbGl2ZXJhYmxlcyI6W3siY29udGVudCI6ImRpYWdub3N0aWMgMmE6IG5hdmlnYXRpb24tc3R5bGUgYWNjZXB0IGhlYWRlciIsIm5hbWUiOiJTdXBwbGllZCB3b3JrIiwic2hhMjU2IjoiODgxMTgxYWFkNjIwOGM2Y2MwOGNiOTVkMDM1NzIwMDc3OTdkMDUzYzY1NzAwODZjYTk1MmQwMjUyYTRkNjhlYiIsInZlcmlmaWNhdGlvbiI6ImJyb3dzZXJfY2hlY2thYmxlIn1dLCJzdW1tYXJ5IjoiZGlhZ25vc3RpYyAyYTogbmF2aWdhdGlvbi1zdHlsZSBhY2NlcHQgaGVhZGVyIn0sInJlY2VpcHRfc2NoZW1hX3ZlcnNpb24iOiIwLjQiLCJzaWRlX2VmZmVjdHMiOnsiZGVjbGFyYXRpb25faGFzaCI6InNoYTI1Njo0NWFhZDM4ZjNhYTk4MmI5YWFmZTkyZWNiNDE2ZWJlOTg3OTFlZGRiYWY4YWI2ZGYwYmQwODYwNWI3YzFiZmVlIiwiZGVjbGFyZWQiOlsibm9uZSJdLCJzY2hlbWFfdmVyc2lvbiI6InphbWJvLXNpZGUtZWZmZWN0cy8xIn0sInRvb2wiOnsibmFtZSI6ImhhbmRvdmVyX3N1Ym1pc3Npb24iLCJzY29wZSI6InB1YmxpYyIsInZlcnNpb24iOiI0LjAuMCJ9fQ==

Timestamp

2026-10-18T23:38:32.743Z

Bound call context

Receipt schema

0.4

Tool name

handover_submission

Tool version

4.0.0

Permission scope

public

Caller type

session

Caller ID

sha256:56b88e0cc9dc43a114fc719929405db446fb56df860727cb95e9222fcdf93939

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

0f42a1145107bb3fe8d46ccf0aa3c0ddeb8abcba8fa7c19439f97df1f435ac52

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":"2026-10-18T23:38:32.743Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:2867dfadc574d23864ba12d78253e0fdad39f65ef773e56346894e88558bad07","receipt_uuid":"84243a77-811b-4f5e-8438-99a37f9b43be","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.