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.

“the button for uploading your own files doesn't work”

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)

2bd2087d5130c681c200b4be9f0793045b6613c6d45749bd858d931b3077cd04

Signature (Ed25519, base64)

9abMa0kQ9+sGk9Kidf7Vxete8RSRclzt3lTFF/23oCMEVdfWETXDNXEcP3/H+LK3k+B3xpdrEdJfUdHaQj3SBQ==

Merkle root

79268b3be1e951447ad916daa23d94d3a225505999279adfec84e5728be030d6

Merkle path

["2bce72d88de44886b7c814da95228e7e879716fca689e2eec6e79707922b685c","8cc83d31bcef29fed307d4cbbbf3d0952cccb08b07865ceee4db1498dd54a9bc","f559c9600a446846a2e0cb80ba1a7eb2c6d853618ae03a227208e1c5a67f0a5c","f13fed048e286ab6dcc73ad48e51be1028af505a914564cbf143c67f1405cb91","db52b9505f57ecb4287daa19d2c72622908971eb3405aa719eb602c585b89104","5cdb25b39f3a17caddbc3bdf01cca8c5e2818a6556190858eb61c4b5b3c81d9a","dd7764b74f74a603d7ae9d4b62c514245c5593dcecfdd4ed60a72a9d5f691a06","acce86ed7d218f4f125b6b7a535ca8d062035fdbf507fa5349074d52d8584d18","980b088c11f77eda906d01acab85bb6c30e7d7763b4e4a7563c8f16d6ae07a11","b68873e9a2a95d4357461d6761c07036150d6d1653187c510af2bee2cb5c5c40","5a1e1b396c4abc5f483318c0b890917f1ead6301ec76c4fabaf6c23b0d600b19","74ec616be75d7ddfa42f796ae5ee64734ee2aef3c18f854d94e8278d3c2de665","ca0926b42bcdad354c17320adc5661c1a0407072f1d5c01424cc2e7f9a3515fd","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":"the button for uploading your own files doesn't work","rating":1,"review_date":"2026-07-30","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 (79268b3be1e9…), 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.