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.

“totale Nutzlosigkeit der App”

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 2622121140

Proof data

Record hash (SHA-256)

0ccd0c358ccade92bcbbb4a15c4c4f13d99a72587e4293fb638d9f2a98d261fd

Signature (Ed25519, base64)

HRQ/d9KLbnxdJkxEk6u7FenuGt9S3DqYxC29QMBqpe1mG2a4Xz1nYFqhVOtbaCWhFvQ34/xPkY55HU6Oyq0/DQ==

Merkle root

f94b7945af97849f26ef2dada74d0b3783c54f0f0489f19fa8afe8ee306a6c96

Merkle path

["0cc8574b977e095e7016bbee3238152f68f36bc3f906044c2b7c7660bc426e58","7e47509194cd10c98949b3203b3997ed84128cd17169bbafc91fefc536831271","b09edfd7ca1efb80eb3cfcaade7bc89bdf48360c95447448a5ef605730ca766a","4f01287f174c0f8d48e85d003476058150cc8625ce6dc9a9c713389149a9a1dc","a828c9e95e942a6cc0f944c48f7584bca4a2af19e9653e8f0261cd5363928312","093a1092291c9d1cda2a225e103e9a0522cdf1d3aab5a657c5949e021212e36d","95a73edc2521dec730dacdf25980feb6a9601f29905e37a165ba2ac6616e6fe2","4d8fd02a259ea8c925315d7dc7fbff3df79d492ca7c5ab1e00e1267f1c7300d3","dc277f81b731e336ac43ecaa61870f5f7292137fdd79da1ca3f67be71098801b","c2520c4312d3fd24a6ba76fb819fb41367990868297696dde6e3913562f210b4","6765b16f35c04d3f5626256700d864f0435a29ef0004840a59216bf016bfa651","1697037352813b33bcf4d10f91b33995fb41126d130156943b0cbb232ffd1394","8d181e118eb520028e822513e5f03efc18ae7d991856247d5241ff56e3087bb4","05ea93df99fa5b6206acd69f9b4a356a643dac0eb1d52f83bd65f540fb57f2d7","64e76f146c9d4ad3d72b8919815ba0c8d2e8bcfcfb5b9542dd4561af793b7d27"]

Anchored

2026-08-28

Public log entry

search.sigstore.dev, log index 2622121140 · entry 108e9186e8c5677af74f…

Expected log hash

551b1035d8649aa3719c4625314f5a126b89dd0eaef0d44a4d7c207189a414c4 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":"v1787896046556","kind":"published-quote","locale":"de","page":"product:smallpdf/merge-pdf/de","quote":"totale Nutzlosigkeit der App","rating":1,"review_date":"2025-11-21","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.smallpdf.app.android","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 (f94b7945af97…), 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.