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.

“Threema erlebe ich als eine durchaus brauchbare Chat-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 2525257308

Proof data

Record hash (SHA-256)

61912fc9706273f6e26b1e1712a369fb14bd0620a017d58fab3a92b96255fd64

Signature (Ed25519, base64)

41jyKUyMq0ZstMTdtco6flVJn1pxtt7XwVTZG6YG8HifdU2E3H0zQyeUfczPkplfypJ9AcRURdq4SfmSyd0fDA==

Merkle root

bdf558524b6fc08556728f259e0f09161d4626349b700d7f30fb50b05a626ea1

Merkle path

["61a311e01da91e3c0c7ad0169168a61e1c4eb7a1a750e0330e53fdcfd4973582","29a91ed0edcb96fbd06474d70b66796babf0759be88dad9600cbee8da6225dba","301d4a35a43f6732a05716b00ca9b811737a0cc31c67eec7bc7604e53f8c1f4b","a4715d1446af4e12b86873df0671bb4ce79558b6a23fa71ac24a299e83bf11dc","96a4d9eddc970da0f409a0a0d822230ee4dadbdb5bcf6e7064b665107b3cc846","edd4671929e36fe70076aa7b01f143dc71527711aadb06e0c40743dc4503fa53","954f8a8c56478aa04609c82b8dcd465dc7b689a3a91aa607d2d5e1ca766f7c8f","4ee42fee3014cc8ac66b76c33699e8f8b861fee1f6410484a4ce4ad1ecd54f2d","96069230212dd01fe581e3080f7dc336810a6f9df0a0259b3aa76c6a79bfceff","1b802b95c1d59fe5b37a91bdfeaceace406ec5e44a37e2ea74e82ed4b1ab6a8e","b994b3415d0a593a0297e4582c9b84775751e393fe5643dc7ea40b2437cf92b9","079d9cbb614502c91ae64f6b44133b3654a69b7111651c8521775e87805a3bf9","eb1cf819ce45c15462a4daee7cea14e45935677491385f66e3842a303f17a540","8e9594a285d2d4b46501008fca51e6cb82167cdc77c21a7232826a5a1f448c83","7c1f9829e354481f51c5a693ce64e17eb8bee61cee659bdf8b794fb330eb29d9"]

Anchored

2026-08-20

Public log entry

search.sigstore.dev, log index 2525257308 · entry 108e9186e8c5677ae552…

Expected log hash

c7cb1a1a9418331323cc64d3f101e644ce5e79412d6e55a22a9342e33025b7dc 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":"v1787195935480","kind":"published-quote","locale":"de","page":"theme:threema/quality/de","quote":"Threema erlebe ich als eine durchaus brauchbare Chat-App.","rating":3,"review_date":"2026-08-09","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=ch.threema.app","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 (bdf558524b6f…), 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.