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.

“Great app and useful”
Google Play · 5/5 · 2025-10-05

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 2633155673

Proof data

Record hash (SHA-256): 10698aac5ef65b772b5afd0d7ad7746120d81b61408620567fe567610c84a6ca
Signature (Ed25519, base64): 3oQbWtNfy791umo2zfAb6tspC9yIJoUx9qjOw74iI2dRnM5VGcTy+jxJ2km0DX7esmJsdO1A+RUwNUBbEvcxAg==
Merkle root: a5d88709ba617fe812c94d00606cf582d21e964e3014eeed21e24c3822682a40
Merkle path: ["106ab7146c5b57769492be490e8c01eef52a26c550453416bdc5f9fcd26eeacf","6ae84932eb895e610afc71e04fe8c8a51eddd2e633a412ff44125a7f5ae8d917","2691a620e0e9aba79d43e669d021cb1ffa832b0a31939ddbeca6f54959ec25b8","a237ebe27b88e439968c18227fe2159bf87155183f4a980f7abcbc5193793d22","b92af127be2152b57db3a9309d076516c6e1b504e0302a1baaa8b684cfda3e0d","d1abcc2bd9efd0da99ccf809fe05bf34133619d4663968624bbdc74cd16de365","97ab52432be5ae4e009bda09d56423a027a2875e87c0643ee09d20182ddfaeea","8a1e0f6c77b62e440662d71a9b1c992d4a191f9e99fb6ab3905cff0b197b0a4a","b067d8b72ad7aa16c431053fecb0d8fd63c02c18c3f0a447151f97a22d9d0ff2","45f48f6b244f5d465f2df62bea2624d0fd019a64e195c4f10a69203afd1db9d9","200c7787f32e5dd039286b94cfb5979a5fe407268ecf32cd8828d14429fb7d14","0d90287140c688b078bbed5856c891d1e5d8314dfae0b71eb7981526e520adc5","7b48dcfd125d0832bd7f5a9c76821165d9d78970ff8029ee47dac7ef938d86a3","aa514b327a9841f1a8b8f1ee34db42dc890d9a3d820327c14f52ced1df128a39","33e990fa14b58c6037d59a973c8935635ce911b2e7d4249f5e781ce19fe14ee6"]
Anchored: 2026-08-29
Public log entry: search.sigstore.dev, log index 2633155673 · entry 108e9186e8c5677ac961…
Expected log hash: 59d0143474a5e64649e00814367477c4772bdc0867286cdc45867421d3d54959 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":"v1787979141339","kind":"published-quote","locale":"en","page":"product:smallpdf/ai-question-generator/en","quote":"Great app and useful","rating":5,"review_date":"2025-10-05","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 (a5d88709ba61…), 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.