fdf3243521
c2pa-binding §4.9: a store of wai.asset.c2pa may carry the envelope's ISCC as the C2PA soft binding io.iscc.v0 of IEP-0020, beside the identifier: the Image-Code of the envelope's picture (where it is not featureless), the Data-Code and the Instance-Code of its bytes, with the generator named in bindingMetadata. It has its own assertion shape and its own verify step: the units are computed again from the envelope and the binding is held to them, each equal (iscc_mismatch); it is the last of the soft bindings (manifest_malformed otherwise) and names no robustness claim (soft_binding_unevidenced). iscc §5: matching compares a binding's Data-, Text-, Audio-, Video- and Meta-Codes with the asset's unit of the same type where the validator holds the input, under a threshold for each type, the decision in integers; a pair of Meta-Codes is reported and never a match. iscc §4.9: IEP-0002 was read. The meta element is read as a data URL (RFC 2397, base64) or a JSON object in the JSON Canonicalization Scheme (RFC 8785), numbers as ECMA-262 writes them, computed exactly; the text says where the IEP is silent or differs from the public vectors. tools/wai_iscc_unicode_tables.py pins the SHA-256 of the tables it writes; --check and tests/iscc.rs hold the committed tables to it, and CI runs both. No runner image carries a Python of Unicode 17.0.0, so CI checks the pin; a Python that does also regenerates. Corpora c2pa-identity/ (three good stores and eleven negatives more; the vectors it held keep their bytes) and iscc/ are regenerated; c2pa_live_verify.py and iscc_verify.py compute all of it again and drop each new check in turn. Co-Authored-By: Claude <[email protected]>
31 lines
1 KiB
JSON
31 lines
1 KiB
JSON
{
|
|
"group": {
|
|
"kind": "group",
|
|
"track_alias": 1,
|
|
"group_id": 1,
|
|
"root_hash": "15a07619db4d1fafea03f70b3c3716dd1022b59941de18e16ddc92ab0afe25cc",
|
|
"leaf_count": 1,
|
|
"joules_total": 0,
|
|
"group_start": "2026-11-09T11:00:02Z",
|
|
"group_end": "2026-11-09T11:00:04Z",
|
|
"signer_pubkey": "26cc24b33fb6bcfafd754b84f26e8239933ebacb70a75ebcdd8b7bf46f24521d",
|
|
"signer_id": "publisher.example",
|
|
"sig": "274ee9b32346240867264b3de74cd12aac5a899e0270ae4bffc5fd0f11a61227706368d6ded92fca4d791ee8a849f57c1d29db22f8ad745fabc1d0702854990c",
|
|
"parent_receipt_hash": "25110abab2affacbd049ebd714e97764ba355c1bf318e5adb9c178a6817cc3cc",
|
|
"sign_version": 2
|
|
},
|
|
"object": {
|
|
"kind": "object",
|
|
"track_alias": 1,
|
|
"group_id": 1,
|
|
"object_id": 0,
|
|
"content_hash": "dc7272b6bcb3691026595e74bbfb6e6b990a78dd66530c14a390cea0f1106a7b",
|
|
"joules_micro": 0,
|
|
"origin": "origin.example",
|
|
"merkle_proof": {
|
|
"siblings": [],
|
|
"direction_bits": 0,
|
|
"leaf_index": 0
|
|
}
|
|
}
|
|
}
|