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 3240422411

Proof data

Record hash (SHA-256)

18ee372af713b7e6c05cbb2e1adc91f332ed5d05854f7f695b8efd7f0d7baf9c

Signature (Ed25519, base64)

R0hEPFF53zGKy7WUIZ8BE5/5J1FVSptzCeJG0t3BNsMfgYtw22cvJHtHy0Zv3RWEkDkLENOs8vuaNtffC3FKBQ==

Merkle root

825dbc6ca55f00c6c81d8de0f7a080bad31b79dfa0e721dee7ded0e9c294ebb9

Merkle path

["18ef440d8fc28936d909b979ab6d4f157318d160202e6bfa6b304f46b0dc8c01","6549f7565f9d596dfcf624ff32a39fea07e6f035572d23dd54c9d25a6ae48da2","e9b7064adbaa19050890af6df3a87aae23c7c493036074b812d51fbc278aa84f","c76d53aa469bbafe48e1e9dfbb020e67e71f84ca693e62611b96ea088b1fe0c1","1c7ea846469ef5007ecd9821f70d43f3566fd305c6dd0c0bfe440043b4f3dc53","456cc2868be0b77da4fff2709bbc30e47e4e38f11813b8089c0f8a2c073cb4d3","790f36aa94291b6b9d5e6d28415b941e704c133b0d9f576c6d9cef072ccc3e56","23037ccb2516fbdf1a6f248a2ea521cc1e7916ebac2d01bcd6f0facc1bbae180","1739f88ad7a76146cdb9e181c3b7eda14d3c5b1dd08e66f6e57aee43e8dd232d","a57443d871f46e626754946f83f3945dc441e8fbd6fe7835cf79d24455c7c9a9","660d6a765109c39ed132fb0afa3dd507047c73076af21c08ed678d2a0c4157b3","9c0c076fec2f0fa7c1094b4111d2e5cedc7ac35232c509cd9a25439361474b1c","1e2e9420d8c4747dca96dc342727525f4c47cf2390ef42ad69829fe37156235c","04c4bd8a9ef95bf5648c9d023612bd1f2446e83a6dcf83e612d031a5ea30e90c"]

Anchored

2026-10-13

Public log entry

search.sigstore.dev, log index 3240422411 · entry 108e9186e8c5677a0ea4…

Expected log hash

8667b0db28913263098c19cb6387cf64b6d68b1b8f2c4242d3139d96cef5da0d 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":"v1791861703078","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 (825dbc6ca55f…), 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.