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.

“Sie fordert mich auf, das Abonnement im Play Store zu kündigen.”

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)

f5f0bb29b7222cb4809b9559148d34579c793c4eaa36cb7a1ee08dd0f6460d5d

Signature (Ed25519, base64)

uktTioBV+z7ys5P3AUEcukAyIQNu5ZNVVVbeUzoIQfqVbBECFDv/T8Ohd9l99R9p1u+1UwEC8Lu8uoxx/4GhDQ==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["f5f73478223a21eefdd7d963a9bbd3d37a5f36d8557990e7ff9ce6b6340edf82","821bd051f1bfe13263e244c3a686534537f1842a43970a601e1a24780b1d2081","a25099c7f487e9289b5e53b53bdd6ff56554ea8c0e67ed6b103846b343c32680","6e545f39cb0e8e803ca13faf4e8d24bc03738f543ab8537088aa6f418655149b","8a493ba20e5468288f3e40679e6136833ee718c9ea5f33c7edf4e81935abe1e4","86a0b96327182b8b28790a1880c8c32977bd4c0b5a5e2063899f5863cbfbdc6f","0559e567f2742f90198add4fc3c8dc79d391146a990607e2a7301da4c654fb33","2979ee265450fe1d6fb67683101e05891b9c6834adc0b7e3e72cd5ee122c56dc","f887f5679935604f9dd74fdb4f9087842c6a4234be0d906b741eb0ba8c990c41","a52e1c5235962042ecdf6bbef0d4db003a996786fa4b692948dfb4ac38e552ed","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":"de","page":"theme:vaia/billing/de","quote":"Sie fordert mich auf, das Abonnement im Play Store zu kündigen.","rating":1,"review_date":"2026-01-11","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.