HORIZON SHIELD JIDEC bronze

ledger.horizonshield.dev

“Bitcoin-anchored public verification ledger for construction-estimate audits. Resolves a citation to the exact anchored bytes, recomputes their hash, and reports the Bitcoin anchoring status, so that a third party can confirm a result without trusting HORIZON SHIELD. It also serves, read-only by sha256: admission records (a2a-admission-v0; version 0.4 carries a content check block of fields only), a content check runner's signed daily root (furui-check-day-v0, verified under the keys at /.well-known/furui-check-keys.json), and the Résumé of an endpoint (/resume?endpoint=), whose admissions[] lists the anchored admissions of the relying party on that endpoint's host.

a2a https://ledger.horizonshield.dev/a2a talk to it https://ledger.horizonshield.dev/.well-known/agent-card.json its card

Checked 2d ago extensions, pushNotifications, stateTransitionHistory, streaming

we checked this the operator says this

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Verified by agenttru.st

Everything here is a check agenttru.st performed itself. Assurance, protocol, hosting and freshness are in the card above and are not repeated.

Certificate: Issued by Google Trust Services domain-validated
Valid until 7 Jan 2027 as of our check on 13 Nov 2026. A wildcard certificate: its other hosts are invisible here, because CT logs the wildcard, not them.

Control of the hostname was checked; nothing about who operates it.

Key ECDSA P-256, signed ECDSA-SHA256, issued via WE1 under GTS Root R4 — classical, as every publicly trusted certificate is today.

Names on this certificate (3)

horizonshield.dev, ledger.horizonshield.dev, *.ledger.horizonshield.dev.
Connection: TLS 1.3 · X25519MLKEM768 — post-quantum hybrid key exchange, agreed with our checker on 13 Nov 2026. What this means
DANE / TLSA: Not verified
Discovery: Well-known document
AI use policy: Search: yesAI input: yesAI training: yes

What this site's robots.txt says about how AI may use its content. Recorded as the operator wrote it, not enforced — these are preferences about use, not access, and agenttru.st only reads the agent's own discovery documents.
AI-facing documents: Publishes /llms.txt — “HORIZON SHIELD / JIDEC” a curated map of the site's content for language models

Fetched from this host during verification. Neither document is how this agent was discovered.
First seen: 9 Oct 2026

View verification details

Assurance: bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols: A2A verified by handshake or card fetch, not merely advertised
Hosted in: ? Unknown · Cloudflare, Inc. (AS13335)
The address did not geolocate — usually anycast hosting, where one address answers from many places at once.
Last checked: 2d ago

What this agent says it can do

Declared in the agent's own card. agenttru.st has not tested whether it completes any of these tasks — the operator of ledger.horizonshield.dev controls every word below.

Cite and independently verify a JIDEC record

Given a citation (jidec:entry:<n>, jidec:path:<sha>, a bare 64-hex id, or a ledger URL), fetch the anchored bytes, recompute SHA-256, confirm it equals the cited id, and report the Bitcoin anchoring status together with an explicit statement of what the proof does and does not cover.

verificationprovenancetransparency-logbitcoinopentimestampsconstructionaudit建設積算検証

Examples it gives

jidec:entry:5
jidec:entry:2
Verify this JIDEC citation and tell me what it does not prove.

Technical agent card

Copied from the agent's card. The operator controls these values; agenttru.st has not verified them.

Protocol: a2a
Version: 1.2.0
Extensions: https://gate.horizonshield.dev/ext/conduct/v1
Who pays this agent, where its measured conduct record lives, and where to file a witness walk. The specification is served at the URI.

A2A protocol extensions the card declares. A declared payment extension (AP2, x402) means the operator says the agent can transact, not that agenttru.st has seen it do so.
Card completeness: complete all eight fields required by a2a.proto v1.0

View all card details

Capabilities: extensions pushNotifications stateTransitionHistory streaming
Agent card: https://ledger.horizonshield.dev/.well-known/agent-card.json

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