Quote verification

This proves the quote below is recorded by Citatio exactly as displayed and has not been altered since it was committed and anchored. It documents Citatio's crawl observation; it does not imply endorsement by the source platform. The quote links to the original review.

“seit dem letzten Update schliesst die App ohne Vorwarnung oder Aktion meinerseits”

Checks (re-run on this request)

• ✓ Signature — Ed25519 signature over the record hash, verified against the public key at /.well-known/citatio-signing.json
• ✓ Merkle inclusion — Leaf recomputed through the sibling path to the anchored root
• ✓ Public transparency log — Sigstore Rekor log index 3273342496

Proof data

Record hash (SHA-256)

146fc0d6be4d1b4d288f42110958f0cd714291cc32e79afe92c0f882e4948856

Signature (Ed25519, base64)

7d+brox3BL79r1X95iaj+9Ft5+MFm/Ts7ClyNuQytlEeJzh/IXKkhbW0XJh/ZcOxRRKC01Mj0TyEL3MfayWYAg==

Merkle root

a6a2b4c9d7d1eafa4a3ba3595aa08f11c105165de84940ffc059f837c445104f

Merkle path

["148378b4432d8df607a5b0fe079088098590261edaa708a23efb8cac5acd82e7","f6493394b225a89c348f697a407650772ceaffae3242aaf80022cab43f02e0ac","391eea5eda9805a6d3db4994a3a966356bec98c8920af8166aaee09bda53d0e7","eb14ce409944b7cac2d6262cc1ee3c36dbf144f0f35418a592127b80adf5ff3d","7de662fbdd67665ea476b69b39473ff8dab3605621a34e3b909b4025eebf5f3e","7b3e54cd907b76a007db9df6572e265734c2e33d3361e6d01d86201516dc963d","edfa7bc156cb1657ec0285e268029920efd46c30dc288f1bb2a097dad4bb25be","9dcad29bf26b11812d0956a57dca9ffbf37b03a6af32865e1a512bf9f239c1ff","38f734868fa70b45e07a4c37e671b453abbc4a004457d1776d58d8fd1f2954bf","7f154c51ff3c96f4814876b421bcc4ebb427ed12ca17e52da71fa208a3396647","ef1d3fcf78029ec473afa04ada12fa541b7305131e73ab1e85d017d4593073f1","8ceb1cbfd39c6c4db73ef7ebf9abc517c7ad214544f8291eb9ba9ebb0a70e4ff","95302ff16156d5e277933eeb7a8aae0bcc9cd9ecc1e7491c1aab462ce098abfe","d9b9cce27629bc902030340ceda068fb90d53ddab20309d3b3d8bb3949c170f2"]

Anchored

2026-10-16

Public log entry

search.sigstore.dev, log index 3273342496 · entry 108e9186e8c5677a66d7…

Expected log hash

8a8ea4260f3039926c3342603d4fca7ca9e5c627d841ac1c7142e303a049d0c7 The log entry's spec.data.hash.value must equal this value: the SHA-256 of the Merkle root string above. Recompute it yourself from the root to confirm.

Canonical record

{"dataset_version":"v1792122420855","kind":"published-quote","locale":"de","page":"brand:threema","quote":"seit dem letzten Update schliesst die App ohne Vorwarnung oder Aktion meinerseits","rating":3,"review_date":"2026-08-09","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=ch.threema.app","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (a6a2b4c9d7d1…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. Locally, without any Citatio infrastructure: SHA-256 the canonical record (must equal the record hash), verify the Ed25519 signature against the public key, and fold the hash through the Merkle path (sorted-pair SHA-256) to reach the anchored root.