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.

“I have been using the app somewhat regularly for <3 years.”
Google Play · 5/5 · 2026-09-14

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 2904877428

Proof data

Record hash (SHA-256): fb638c6b3062dec6c3f293799c782db081068e87392dd9f408c794500fef05be
Signature (Ed25519, base64): JmfUgILRpCboctr2m/CfSd8QPCwTFrsbykM0GBRS4j/0L2LFzvuFOiW4vy+IYrOWE1tCbCKj1GMpZktbZgfqDw==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["fb63d8a34b2dea4ef1ed48c395fda4c3585205f01cd9c5a83040a87eb9cd58f4","5c738bd6ce3cbefca38257b7f479a8ac00f7cc4a140eceee9116828219183715","d5f5f855809fc675bac7046283c7eabc0ff786a5458e8d2b86035af452bcc0fb","ed4d44f29b7fcfd4447873a7687a15976bd26cfb07d306003b0bd66661ffb61b","d4acfe8cd5f501ca434e8b695f42335999c1b9cb028da783258634bb5622fae1","4686238f621b795162815f8a2569914692e1ef52cd40a36c1fc5ddd6710644d5","0e2ef164ad54f41d010160da6bb5d9f2fc6fec362ddb1abf559170b1819e0d44","ea038b95719800e73efa51118782ffce9ee36244f7905ebb74e003379c338e12","801f0519dc58367d6c56a35285904944ee3097971420345fdbfff12766a8fa55","810c2b483236c5da900ac0ee9beef62cec7dbd9d526189df63678c5b7243b882","a3cd6a309f10748c6992d7d249a79b7e2e2669fa48a49dd673039acab527d8fa","b382aebc31acbad71afb3ae06e4e6f9b354e9da57050f36d03bb1ef97dab503a","f95e3a68f572f5650a4093453e2bf28168547fa91a01ce08e539b3d7016a3f80","53a8a23597d45564e495678bf6125e41ef42f347693c924494330dab53ea1e2d","2a462314156907e42d6f0d96eed96123f1d79516aef73ed189d9f5466556b638"]
Anchored: 2026-09-21
Public log entry: search.sigstore.dev, log index 2904877428 · entry 108e9186e8c5677ab408…
Expected log hash: d020708737f55ccdf49203f373fcbcefe8158cc388605556fbfda3c365de7360 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":"v1789881486272","kind":"published-quote","locale":"en","page":"theme:vaia/durability/en","quote":"I have been using the app somewhat regularly for <3 years.","rating":5,"review_date":"2026-09-14","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","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 (e299bf38720a…), 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.