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.

“Hilft sehr, ohne Grenzen”
Google Play · 5/5 · 2026-02-17

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 3258071454

Proof data

Record hash (SHA-256): 0e3fe6887b9c1c1caf1b504b40dddb42618488af9dc14b79f00bb5753e426237
Signature (Ed25519, base64): wU07Aqmbh9APs10K7UDLBJzCpXqbyoAqayhsM3iaaMliN3Uwxm2ROpXv7LUU6n88f7CWMCXTAMGn6G5Edw1+AA==
Merkle root: 3286418fc06d25de584969d1d1d5f4b079918bf6b5a5178364cae8b78bb351b2
Merkle path: ["0e3841a2eb25dcd0d75b193cd58d108f98a826dd843ac46219574f7d4a9d9a3c","c11980ee73f306ff40ef5a1d1fd5a5f8de49a85fc8c3f27402f92dab6fe08623","526509aee2bfc97e954a867593afcea13f8c04c5c35eccb806ce392a7fbcc355","9b5edb90220b10afb42c98a865c891cb3c5cf2212f47dbdc760b23d5618207ff","ae75cc704f56382072dd92140cd072d28f7a5c032c2bb6924fe2d4c00e4965c9","38391744e7001854cd3d297bb70961fd823617adf46ef7732f4c240d05517649","baaf177a4f399d5fa59e464ec0ec44571aaedb311bdacd8bfa5ba50cebab78eb","a48c6427b5d2260ac3e15f819f132a2f6cb7a8ddd9ee38d5a9af2cbf72c9fd00","e8cce96b8cbc8a736af82337c9df4ba1c503afe965ac9f283adee8aa7c3ec17d","68d094d935a776853d351bd8b2d015b0360b21ecf82fe1a792eb4b0a2ccdba45","494224fbb45fd428f77fcc9951207b1e46e2d1ab087e71efa7665425c9a98e92","49e05cfef927266c6a609e22c205c5fdf538ab222e94c5e3282700418f88dfb5","d9800b1b87d047478eeb89f8a1dda19593d3b273c40fa6d591a1b944763f5e83","b4d8773b8032d1dec9dc6fa4ba1d52baf4d9efac6a7cb542ab0617b855dc5284"]
Anchored: 2026-10-15
Public log entry: search.sigstore.dev, log index 3258071454 · entry 108e9186e8c5677ae2ee…
Expected log hash: f9026b3bdc4a2e986a01140b2370b0ce9ec3e7c9353055dd7c9909c6a9941809 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":"v1792030101458","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"Hilft sehr, ohne Grenzen","rating":5,"review_date":"2026-02-17","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 (3286418fc06d…), 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.