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.

“My brother showed me this app.”
Google Play · 5/5 · 2026-09-13

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 3241084060

Proof data

Record hash (SHA-256): 27b790311ab186ca33d81c6954d1a929dcd35b9009892abc55375bd22e568b9e
Signature (Ed25519, base64): WYfaXjfZpc799K21MPLUjio1JT0V8+JQ4aSNI8jFLegu7k8hUK9DSDABAZF4L34k0xgCxnUpiWCP5bTW1TrkBw==
Merkle root: 0b0c0499033d3f9b3953d31e6c838f88f12988dba810dd4de44922e1b60fcdf6
Merkle path: ["27b28f991f5e45fdef520b572eac0ee4a9cf44034699c736edcf2d8dbcd3ccef","28022bac19b2569674c735d038e9e3b11e8748d9fa363a43862eeb3e5a32195d","800291439eb25a13c740f042eff88eb6c3c1bd14b756302ed40bb2836e02e7aa","b8801ec34a2ad4823a7d6f5834a01bafbd955e45fb4a0761a67dbdb641a6704b","d8e1f09af98d3110d33e6e5a9210f6fa69538228b31b7f9f225d3e5d79d3e78c","7249b5644d98cd733b1f52e0f0d54e7a0e60484f177030ae716b4c0177ced8cb","05a55bd7495ca78d5c84f638eb305fc2eef460d9a91c6e2cecfc4d55d965d7b3","ab7f2546bc97447750d3c9a35ca9304f987affe3453d1d5d4db13b504fae32c8","c4f0cb8b4d6ead4dddc58266738f16781c77c4611778b6c32e7a8ba126459dc0","64d86e60ba50f0d28b35dc040fcd4452c5f994b4e63cb3f350c55de0f9ab904d","97bb581f373ac1585fd287a96ec92f37e16a17e7e09f4b197ef739b8fa5c9cc2","fd4caa7c5bda5b821309f24a41bde8275c1fa51be2629af50c760cc53c258d5e","fe7751fa4b9a0ad43fe0710628b6cb1b92e12eb8a60d9f17eb0c0764d693577a","8a05b9e19287b30c7fb54816a1fb848939f3f2c84b9825f19f342683d5db13aa"]
Anchored: 2026-10-13
Public log entry: search.sigstore.dev, log index 3241084060 · entry 108e9186e8c5677a3e82…
Expected log hash: a291e2473f1a4510a666e020d4d424e463d55bf4677b91eb5a52e446e5ff1581 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":"v1791865115768","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"My brother showed me this app.","rating":5,"review_date":"2026-09-13","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 (0b0c0499033d…), 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.