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.

“something a student in high school can't typically afford”
Google Play · 4/5 · 2026-10-06

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 3199014646

Proof data

Record hash (SHA-256): 50c714c12b91ce3b15f8746c98163598e376a54a9ef9728e4b90c78687735980
Signature (Ed25519, base64): vc57NIgVMbV970pYnoh+ORNJl8etbtZ6+Msui9f3JsyxZSPQWLu8j6iboG2CQHb0jI6wIcrAry0reLqW0cOsAQ==
Merkle root: 79268b3be1e951447ad916daa23d94d3a225505999279adfec84e5728be030d6
Merkle path: ["50ca3747a897afbf06b8a6ab1429a93ad620047f0fa6a7e9e21f9fec9b507ebb","1bd8f5be8ce4d9ba3391d4059629956a8628469e4dd70e1cd1bf71583a28234e","e29a744280acf9223832b2404b750d6cc2eb5f37ba549534544854210981833c","41f83a99ee153aeb9d9e6423d94e1b4f82d3fbb2896a01e83ca1705a60969352","434991f1ddbd563162226f8df94f5cd90cde976053dd04c8be280267511c0be6","fdca231060b940fb03699a2e6ca2c7866a2f68da684210eba1c8f35ac64ae960","a04e8e506d42233d20b2352160f03da9435bb1aab38981b16de5f4fac0d02b62","e98687ef1ac39d62e73f42b28bc7f5c004a693d2872ea04584ec182493273e41","cfafe7bd8617dc0eb92a66c9e91be6364cc3e9660d7933fc4d0fdf45ef8553cb","93869db40404ab68847784d162f7a2e1d993b1fdf7b2bf3e4e19069075e35d5d","fa7d3c74616b449fcf1d93e58af28e7cefc9e07a2788ee9f99d020157c788ac8","67489a45554ca41db9207c6fc4b13fba605b6cd66618be3880218bae3c1e199b","1ce9afad9ad086057c7bfc40a44d07199e0e2fbe95565fbb52e4e14d796716a0","b8e0a41590cdecf5ee846d5a4dcd3ae91c8a0a052b75fffe7c4c5f4e2ca53884"]
Anchored: 2026-10-11
Public log entry: search.sigstore.dev, log index 3199014646 · entry 108e9186e8c5677a77ce…
Expected log hash: 55430b734e4d00e4ba9c340c7ab064436f91281dd4cbc27c1ffc37d3e26a0e3e 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":"v1791688566698","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"something a student in high school can't typically afford","rating":4,"review_date":"2026-10-06","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 (79268b3be1e9…), 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.