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.

“Wie PDF-Kürzen, Komprimieren und Zusammenführen”
Google Play · 5/5 · 2025-10-14

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 3258717636

Proof data

Record hash (SHA-256): 00fabf634873991a65789007119f99593026dcfc01fcfe196047674c21f9001d
Signature (Ed25519, base64): 9k3D/I72D1M438gSR39dmqT5Un0OAznSspxPd3dQZbEhYIzRp2FFOf8tmg8V42PXZpMdMrtn4LXqueZoII7zBw==
Merkle root: c1d49fab62e94ee1796f3eb15e1a21f856756e9a68ad117a17ae6c9694ffe1e9
Merkle path: ["00f7ad72af0bf02cc16af944c6c871aa32be14235796852756c18567abf124b4","01b721ea8bbc4f4c609529626662871794ef15974c21f66782fb8b346b3cf425","4b453f5adac7292fbaaa4aed40855e2a2b9aa82eb661abaf9a29cfabfd3e6191","9b5f62fc53c280bae17cb2d5d569a0532d4d8dd43bb18113392ad7f85b088802","90f5819fdee3871c4addbef2dadd9e83066ae503ec3807d40dfe6228737ff87e","b099e4afe406670f06be5bf58aefec8d805f596fdf396f9ca2ee07e3a9b7ccaf","adda7baece62f2f969ebc54751359b0fbf6c90bd85aa990a634d4a5a12727cde","53490a17d891abf478c70c47f22e2a59257df8d417c9e0af3b296b2dd8310d05","8c8deef4d7706beb3fa61b30e69a9bce1267a403ce2db49628cc9288751fc3ed","e6db3ed0df7748ef325ac55dfbce627aa766f6ed408ac7ca078e7168bd572ddd","d3ed394b86f69b760fb77a1c3c31f997206df8fc3466086cc195eddf9b175789","219bd599cfb89fbe7096defae6a66c994562ac0a422a5db43368bd9cf9789683","856d9a6a3e94d695a98fa0bb5ce8d80e9fc70a3794652b53ea754ef3c0720b7a","436050ea3288f64644ca44d910bc166b737265d33885dda72495c78f7429279a"]
Anchored: 2026-10-15
Public log entry: search.sigstore.dev, log index 3258717636 · entry 108e9186e8c5677abf47…
Expected log hash: 30640a6c2a3bbbd5aa6e5244e634da7339a6d42d7209b3c3a5dde0fcd662474c 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":"v1792034121129","kind":"published-quote","locale":"de","page":"brand:smallpdf","quote":"Wie PDF-Kürzen, Komprimieren und Zusammenführen","rating":5,"review_date":"2025-10-14","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.smallpdf.app.android","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (c1d49fab62e9…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
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.