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.

“When I want to type text, a white screen appears”

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)

f283a982eb67bf7ddd25e9a94bd7fbe322b678c5d61554743d50e991fad12449

Signature (Ed25519, base64)

lUeQSpEBgSJZWn1rAd5stEnSYKyMnOnnyAAhUKxSTQxgTgPwonWwoHBayfIgo150+hszgnbH3FBg7lLi+2svBA==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["f282c50b9d8077fc8b22eba9f2e6d38365e751a295bdcea287aca798a8b874d9","13f471d6310a6e30541fdd76369eda836bb29f06279f6eca736ea605e0e3b5df","3cee9613c128f1047fca0a6d2a6834cfbcc1fcab8470ec1fc47a73d15b25d367","5526442d876637223eb908e6dcf546ee009992b34f3637fab7bca0dd6268a7c9","f23c1f3ba95ecb134690bcf37867ea9e105e7d2ed17a33d7fec0d0d217239f1b","a14fdf1b68899b5f5454668f82c1042f71ec56f11507ed11650c301244eaab68","2e6f22ddecf965b1422962b026e6ad1818e5b64ac09b281adb16ddd915340f47","8a6e98d941cb0db675afbf46eafa4182b1cf8ab1b3013ddaaeffbe5cc43ea051","5d5a4687d78bb553c94f7e45228a1539739dc15e71a28444768fadaa3e674d15","715b178d1c714016557207318fc78c34ef829dc799125ac93653f7df74e3640d","b331093f92df4d03f0bcccdb4c283a2d98779d6c363a06d0cd9c35338c6b7f1d","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/ordering/en","quote":"When I want to type text, a white screen appears","rating":1,"review_date":"2026-07-25","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. 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.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. 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.