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.

“for some reason, the conversion of webp file extensions, which was previously possible, is now disabled”
Google Play · 2/5 · 2025-12-17

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 2594765087

Proof data

Record hash (SHA-256): 0bb38eaa87cca81292d77ca8e6ae2baa56cff0b6b45e177abb2a9c2ae5ed3a6d
Signature (Ed25519, base64): NS5xFguxV7fzFCIq3kDwbi83EV0TABenxI9jeF8P51bcSUZ+sUXNazEnNuxDPcn7PrFCNKVfajzeHuhpQEPgCw==
Merkle root: b839fc90680d59ef42f94824bc47a43844eda063a2dc78e98d04cc6ddfcb474c
Merkle path: ["0bb502a5be057a523f69a87b525e63530e28fca7cec97e0490ddd84aa7804af2","2da92f051dd435c21c4e8f14b35bebffc8f3dacfc4304216237479b003b90ac3","019422fd3640767b6d32bb4f78fcfd46e0160d86e299bcee10e53dbf903efd40","e8af8379246cf72c62caf8eca8b3a2823b49bf2f8e5bafdac4431a220a509651","83de84b354e87388bb0e9697a7d2df615bea4d5726407c8a982539e4edc144cc","241bed3195e37ce2337dae3745db65628df7c6c46bfb1288fb1f17eaf2cb98d2","fa2fed2ad39e9fcc54be42d2ffa30768a9629e6b1683f58195e863422392e584","80c9268e1a9120df95a5aae22ff66840bb37854443436b047c3f0718dd5b3a6a","3c5f477e45948f2702afa3a57c394a9851582c13f4b5258fbd5b738b22fa17d3","7f31e77f58de8a43ef26b91683492cdbec3702007c43096c5a97f3baac77aee0","9ee71af0e0202bff3db5ceb8906e346af79c56ede3a8d502ae51684b1bf2d693","da3f18db4275ea305f12e1c8c0800014ede0f36037fddca212d2e67d33301687","93cff867a371eca67187fa18f29672e43dc122f1a11ead8ce02d295afdc520fe","2d44a3f2a338515d5139d8c4d918da71ecf66353dbaf922a6fd5c33bea9ae2dd","53cddda7a1b6beb992bf062aa34497189c716ec3be3251f7e5db0dca344b1a73"]
Anchored: 2026-08-26
Public log entry: search.sigstore.dev, log index 2594765087 · entry 108e9186e8c5677ad8ef…
Expected log hash: 2b2c4baead5a20e634c42acc5e7cfc8d7389892f0fc879f3c38d7eee1c04ecac 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":"v1787715994367","kind":"published-quote","locale":"en","page":"product:smallpdf/convert-pdf/en","quote":"for some reason, the conversion of webp file extensions, which was previously possible, is now disabled","rating":2,"review_date":"2025-12-17","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 (b839fc90680d…), 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.