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.

“die Qualität ist so schlecht, dass du da lauter Pixel auf den Bildern siehst, weil die App die zu krass komprimiert.”

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 2657817117

Proof data

Record hash (SHA-256)

09806f88f08edc82400cdb355e48155cb0db5aa0f5218109e5ab32087beac32d

Signature (Ed25519, base64)

vvU9MJxiX60otTwaUIc7lBjbYlfxjipvA2IxYDJu3h0EbwcEMWoxObIG4LNleNY0f0JssiprVgKSa89bsaPtBg==

Merkle root

7c31845ea005068c52611e47ff2778bff3790bf9c71538767447b45fe79322da

Merkle path

["09816571e910fb311d52c4da34f5036428ff66e2cca539c114c1ab3b8d3a453b","b3215839a63f3221c93934d860a0d57cd0957b331d834eee399d3cabcfd1e2a2","cca5a6a52296bfd3100bd55e3ee5c51838d3312cc6ea6fe6250f27f4be420270","f4b9cf36858e91c97445c6e568ebec386d1bcb0c11d1a594af1999cab0855471","bf255e9684bddc82066569cec21ee64d04da727f1c79e287511dc9052d3deba2","4199005d8357bb10bd0bda551800c1d3f467367636186747aeef5abc43b6756a","db57411f409959c710d84eb642b4fa710ef1b35c8b5ac870178a5022cab15f34","313cd9a325f4a4c8e0e320a57d88244c64e251610b8676044ca0db43a205ab55","4be92aa2412dea7b04e3d2f43664273027a86a4d69dcc48046a9c988763c0db3","112798e60cbe649360bf0e691d77f14be3e25c5d9e456f9b064d266ef78976e9","d725721ef4e46a74ffa33a5b3eaf5461c6d90eaf7c1f1f95e9c66dcb49eb98e3","6ceae28d9d9991c7f0978d9583675f513d5a8b980f19419645347989922bda23","de406c010b9d09d7f74176c9d423f8d72b745ac400e2c0cfcdb434d0af8fcade","e49018058753e3439518d8ba4c827c0b343729e39fb424281e6808f61fcc629a","4f862010adf0fcb97b6b2b8112f782a485805bae9f9783a7b39739616b9b62e0"]

Anchored

2026-08-31

Public log entry

search.sigstore.dev, log index 2657817117 · entry 108e9186e8c5677ad3ca…

Expected log hash

0666b5f97f085fdfc4cedfba58ac7e76857cdc9faa5a1032ef597cdb93024c5a 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":"v1788148095319","kind":"published-quote","locale":"de","page":"brand:smallpdf","quote":"die Qualität ist so schlecht, dass du da lauter Pixel auf den Bildern siehst, weil die App die zu krass komprimiert.","rating":1,"review_date":"2026-08-20","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 (7c31845ea005…), 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.