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.

“Thank you for the user-friendliness”
Google Play · 5/5 · 2025-07-28

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 2776103867

Proof data

Record hash (SHA-256): 107012e78da3ac775ece4708ffde95140bdd6198644ff3d1ed13ec3980b0a659
Signature (Ed25519, base64): ++WWCGy7qitBK7xz0kDFsxdHORwWc4A/1vqWN6sRdMeM8i1WxP0ya3GDztLjGjPkyfXISdUItggtGP2xIF9aCA==
Merkle root: 4dc0bd79ba3e9442f7f1feb21f347e2f6fdbc72e99098aa5164776a6202654a8
Merkle path: ["1071a08b27e68eada069adb811118048cd5949330f0785a5cc200f1ec3f25c1b","b0208a787053b3038dae03d9edbb7da6de981bf98d86ab16e0d67f8ed04b229a","1e9c0c7b471019199ac4783d95155b645b1fc1919b7c9a6e3efea0cc45f0e263","8fce717c1202d31808257b1ed699b777a1334812c7635e112e9c03802df035ff","f7405c054eabfc4f0f752ff89111d011e9770bcb5a640ad2caed8c473a9016af","232a74e7d89c4fbaef4b3e76b3fe41604fc6de84c6b02ccbb98c5d34b33f1872","5af6a028c45a96cafeabad324df57308a6689ca57be5e9241b3334a4068ee18b","c3fc246b5057fb7ccc70ee925fbcd57c88c4ac7e55ed2cc492304991dcdf03ca","24a28b2c88a2e9d26a1c7af9469557c7553b41c165b2c0561c9c70f93a22afa2","7f2aadf9f56bb611e8bad5cb3e1ac4a862cbbe13187dfbbe35172e0dedf19a1b","ba894b4be4882cdd4ee89df93fc269c4b5650c2f893ba96b1cfb28c1d9866900","601d3d5f4fba7ccb8e25e8db9adc4fc1a6094821bec2364894f7bf4c640df5de","b64868d5884e6ca103d8fa1886b59a755a471482d82618eec868304914b8e334","72f96e42060ae616ed33b8fd6ac687c1899623eaa8a351026bf33e2e7a041d34","e60c2274998b06992577796b6abe86bec144203fe960878f7951a3ae12c9e532"]
Anchored: 2026-09-10
Public log entry: search.sigstore.dev, log index 2776103867 · entry 108e9186e8c5677acd4f…
Expected log hash: 2498329b7eaf275d309293dfbac35d05dfb8a55c65956add8448561c05945f28 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":"v1788848066028","kind":"published-quote","locale":"en","page":"product:smallpdf/ai-question-generator/en","quote":"Thank you for the user-friendliness","rating":5,"review_date":"2025-07-28","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 (4dc0bd79ba3e…), 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.