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.

“It provided me with a study schedule, flashcards, exercises, and even the option to take a mock exam.”
Google Play · 5/5 · 2026-03-06

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 2907673729

Proof data

Record hash (SHA-256): dd240496813b919abcd4720a3b949dcc304fe81d675b087716dcccee4741cbd3
Signature (Ed25519, base64): LFExxKLPtBP5ZajUDK+j+EU5zjycitI8sOm4PmrkFxa6eksvrgW9F7/eZjKztqXBOdf9eT6NfoGIxLqAR0ryCg==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["dd227c77ccd4c85e79c5fb8cf69e57cbf2ee7aecedf4ddc15ae818a1c617202a","98d4f50fefd05d0ae7278dd6b0f1e73b5429bb4f0dd13e7f0c63ea8c3367badb","1a65823e757d1b0303c8931c5bc8eaafb2301dd6405581a8fee32bc9680888c5","6ae0fe15d56e4b784226cd3022e774bf475a2a1fcdace35568af6ae81ea102b9","a1be1245a811643ceb69b5554fb3a649183dae944eb63f7a290f63cf9f17c065","14f578b4dc1d1d573f5fe960c9e01e82fc18258730bc96825272f06149ba9859","c656b925df599712d8039a5f3a0f0bbea4a165cfe921ddbc664b6e76d48ae8d8","a6b0027db7ff514272dab70eed859a7a0d01a18d286c29469ba7c5f004cfe4bb","b056b69a3e8d4124a2a5194bfe4f0836fb041500d6a9fb0a540d05a236eceebd","f18e99ba7a78a6b565d7d78fe31bfc86a3092ebcdf35bb1810c3397e6664a935","d724de4db852592012d7e350c865d36fd56f7f3bf918292f4d807bd4b562df22","2d0841904d905b327cb803816e73e56fa86447bd28a90f792c27c874ed9a6b9c","c975f4076f62a76765a4bc502e988829db65110a1650004b828d2dfb5f90a9da","f92a7fda99af63eb008476cac47b147880eec6868f847624f8b438c917195408","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]
Anchored: 2026-09-22
Public log entry: search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…
Expected log hash: bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"en","page":"theme:vaia/delivery/en","quote":"It provided me with a study schedule, flashcards, exercises, and even the option to take a mock exam.","rating":5,"review_date":"2026-03-06","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 (b9a08f9d6d76…), 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.