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.

“Essentially I got charged 95 bucks for a service I never used”

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)

7df880c214c735b853c51973171155f791e5231f6a9d1081cb0bcdd450df9e00

Signature (Ed25519, base64)

tBjDBFrgdgWhKRnqX1df4RaJhI7YXiaI8DpGdxK6PhsIvCyaisO7V1MNLhbEHplQ21mQTjaoAQNBmSwnWbmfAw==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["7df805c5dc091e9928dd26184e79fcfd2de25730b845e4a7f371f3a84c0fc714","13e8383b77ac2f937f6ad9a7b4d86fa19bdb7e59f10e1904750baa768085c4db","9d9d01a6d39c13f3da6f880c81f0a9b22bdc1bd4a0d5ee01180a4ff47b85408f","5de017c89d91462cf8728d2a8727efd7b99761e08f265dffc5ac5c4893247c87","df506bd84983742da32ece81e1265cb2357958f2d830a796b4893c77c361ecf5","314c47bb16aca928942a9d7df5ef75b4bb68548dbf17657f1a165bd8f84d4347","dca7b016fabbfa5a4d1e35a79e073a43abedc0d857b32a9b57d8016455103c94","b55a63b4f2d6f815f9221a9253f383f04b4dd2a58168365d43622e6000a3702e","f4104dee712da30244a5e67029bd886f2e42e8585d3a067e9180a3ebc9b5b0e1","f04083244b632e3f16e57317adda1c2d5e08719ee6e74a3c8970207b0cea049f","fe718997edf5ba83b24bd1cb8cfa58771528317111e3e956c9e9f853ee4ee6c9","f8cfc666649943796cc64798f4b6be7235ebee26ef544e99b42bab2155b6cbad","8b252735b283ab7584d9f6925f08ed38c911c64db001463eafabe5061cb6f9fe","6c299608515c69a03540be35865f96ca4932f3e0403f8f39fb0e1c2e2aedffb4","43a562d6822dab12c673c1efa0a3171d1ef69b949f676fb01847e1e5b56274de"]

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/billing/en","quote":"Essentially I got charged 95 bucks for a service I never used","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 (b9a08f9d6d76…), 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.