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.

“very useful app”

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 3272785693

Proof data

Record hash (SHA-256)

1a8feb4d537cd9e6c88f1a51f274f2ec7bad7790dabfe6a712cf4897c93b4677

Signature (Ed25519, base64)

7fQso4nTGz/UTiQj4Cz+PduoTXCwhf2WalSHAg72hKCf3Q5JKKCsguMfF+VvYixymH/72kiRhzTSkIFoWW6cCQ==

Merkle root

42ee8ba4b974d737f78b7f168d0af8ea0510697ac4ab4c6db44b5522bd195660

Merkle path

["1a8829b0492194b76fa248d7cd0543839f20ed2c2d3be1e4068f850bee0fa259","abc4c3f8eddf0979e385a515999f39217d226e7d5cd09b585b4dd982a54643a6","9196d103cdf5db606b1d30eaaf744f6bf6b31b96dbbe90edd5085f03e1d8f9eb","ea8fefffb3bf8224a9dffc23db80f7b1662030baf4cd6ba5e55ad610c3560962","aa2ac588e6b3a2ba5efda9d13cc6af5cc450cb3cbb330bf72cd5353e812ad832","31d0a438fa3501c6161371b186db725b566c8a0f86be1764d76f6bc306eb37cc","0062cdd17a4757bbf3a1c8837aa28fc50056c4ac455c33a20b5eff32b1846d1a","58dd63bbad6b8aac84d35c8d30a20531ea158bf866e367ed42b089db4e00a85c","0953bf381801fa7e95a8457143c3cf05fedb947f209564460c25b25fc051d10b","907f73919d25d5ed6af57c60195659de7340b10474815be4ae55717bead6e436","d7d6aa0060ddf43900b4c89a5341fdb8b45cbe3c238096077807e6e2f587a8c3","5f15fc19c161cf1b078cec1dbb446ebe0ad796b02ab5da46a3b86356dc6581b7","49dd732b74591111793e90f822c8febb6b4e9dba2f427a61f4d9f7035d4c82e9","c77ac7da32c6d4db47aeb73e606322601c1bed1566533de53bf56d1599928d0e"]

Anchored

2026-10-16

Public log entry

search.sigstore.dev, log index 3272785693 · entry 108e9186e8c5677ad5db…

Expected log hash

3b93391ec0595ab5c0ff73f2540eb1322f56c3c1302e6789c57b97c74423deaf 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":"v1792118508353","kind":"published-quote","locale":"de","page":"brand:xodo","quote":"very useful app","rating":5,"review_date":"2026-02-11","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 (42ee8ba4b974…), 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.