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.

“a subscription of €13 per month for occasional use is exorbitant”

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 3273084324

Proof data

Record hash (SHA-256)

195b4acab4dab45140c07d0de4d0d9d90eba3e9da048a378c2f5d73926f84147

Signature (Ed25519, base64)

BaHFu7Hs7iLVkkicGIeTPC+P95iN4ejw84cbFyfV2Oy5NSAyaXQMGAHGU2mrdysuu42kevuYmbK2Y/Z13+OjBw==

Merkle root

4591ccf5fcdb01ed421243d02df5f30203ce391c077d4ade1ff5ee97e69e252d

Merkle path

["19432f2a5b45d1f3dbec9da1457b8bb36d0382fb33e60038fb2699e25bc05c1e","ecc83ba18a8834a02d45c9829ae8fa76fa26af76cf6c151bffab155bdec992b4","6aa372519c58de1f0dd0041c8736e8a997e0dc46dc77038789073dbe4aa6ca23","a46b56d86cf03d5bf540dd3644b94032e5f6f104923570b2a190522b09ab8857","7763e333b91ce40755ffa3ddb56a2e550e9e486a23c2f4f71dccb762d71dff85","dc77164dd72c44fb51f7d479e62f02d0199a8983b5e1463322f8247362b54b32","bd7cb450d4896b23265d9ad0521a21469bef3495d00d173ab324a9bf9211366e","ee781963cc33ccca0637e67999c3716f7c1d32f6e92e26f35148bf4a0556d401","bb15f4ff800697d3757fd1192e18df01666ba3bac12e0e7fba017645bb7b058c","81f7fcf1ac4118dc140c85c474e7764b52a5111a49311a3051961e1c448490ce","76248b44b9ad9d60e7f57955141277233f0834109c44c736c126c5e9ab5f3075","152c0493178cf6b4404f105673ebfb1205dcd47946cf0dc7bed8ccf29e922fd8","d52611af45c7ef524ab63e970b046a1061f8173af77bce3332bb854291964d99","04789af0aae7a52bbc7d5e129e675a1c89df82999aa606ccdd23b89f718c4ff3"]

Anchored

2026-10-16

Public log entry

search.sigstore.dev, log index 3273084324 · entry 108e9186e8c5677a4edd…

Expected log hash

52df3e0fd214b96d6c701f5f337408916b7566fa39826e2404f759c290be1eab 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":"v1792120358245","kind":"published-quote","locale":"de","page":"brand:xodo","quote":"a subscription of €13 per month for occasional use is exorbitant","rating":1,"review_date":"2026-05-12","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.xodo.pdf.reader","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 (4591ccf5fcdb…), 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.