{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:MZ2X7Z37OF25VFFI2ORFJILYE3","short_pith_number":"pith:MZ2X7Z37","canonical_record":{"source":{"id":"2210.11549","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2022-10-20T19:31:23Z","cross_cats_sorted":["cs.MM"],"title_canon_sha256":"295e3e54ec3791d955947ed70b14c0c54850976c2bdb524ec005a91f032c05f0","abstract_canon_sha256":"85b9ae2e9fbebd5743aee6ca2e596a39052b036ab1661848ba0079b08cb1dc5c"},"schema_version":"1.0"},"canonical_sha256":"66757fe77f7175da94a8d3a254a17826e67aecc085dec13857095e631d11848a","source":{"kind":"arxiv","id":"2210.11549","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2210.11549","created_at":"2026-07-05T06:43:37Z"},{"alias_kind":"arxiv_version","alias_value":"2210.11549v3","created_at":"2026-07-05T06:43:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2210.11549","created_at":"2026-07-05T06:43:37Z"},{"alias_kind":"pith_short_12","alias_value":"MZ2X7Z37OF25","created_at":"2026-07-05T06:43:37Z"},{"alias_kind":"pith_short_16","alias_value":"MZ2X7Z37OF25VFFI","created_at":"2026-07-05T06:43:37Z"},{"alias_kind":"pith_short_8","alias_value":"MZ2X7Z37","created_at":"2026-07-05T06:43:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:MZ2X7Z37OF25VFFI2ORFJILYE3","target":"record","payload":{"canonical_record":{"source":{"id":"2210.11549","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2022-10-20T19:31:23Z","cross_cats_sorted":["cs.MM"],"title_canon_sha256":"295e3e54ec3791d955947ed70b14c0c54850976c2bdb524ec005a91f032c05f0","abstract_canon_sha256":"85b9ae2e9fbebd5743aee6ca2e596a39052b036ab1661848ba0079b08cb1dc5c"},"schema_version":"1.0"},"canonical_sha256":"66757fe77f7175da94a8d3a254a17826e67aecc085dec13857095e631d11848a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:43:37.246708Z","signature_b64":"F5pGGVwqeB+4nrlmcMW5USFXNhqf2Qn0CNQoYHZlGN0dpwSx2CwYXPUt7YVbmraqn3RWM+gsdiLDviuHR4qYCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66757fe77f7175da94a8d3a254a17826e67aecc085dec13857095e631d11848a","last_reissued_at":"2026-07-05T06:43:37.246252Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:43:37.246252Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2210.11549","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:43:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HrVsWkFhsyAOZgrHPtWtt1SPuidhwoz0oqOEGZYvTEMl27QFSVPLp0ddojFbspSUpBwehV5OppiOSddnykS5AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T10:15:30.133275Z"},"content_sha256":"d95e5e628c35246c9cfa083a610bf02cd56ad334a7ece5d88e8436278482e6cd","schema_version":"1.0","event_id":"sha256:d95e5e628c35246c9cfa083a610bf02cd56ad334a7ece5d88e8436278482e6cd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:MZ2X7Z37OF25VFFI2ORFJILYE3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"H4VDM: H.264 Video Device Matching","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.MM"],"primary_cat":"cs.CV","authors_text":"Edward J. Delp, Paolo Bestagini, Stefano Tubaro, Ziyue Xiang","submitted_at":"2022-10-20T19:31:23Z","abstract_excerpt":"Methods that can determine if two given video sequences are captured by the same device (e.g., mobile telephone or digital camera) can be used in many forensics tasks. In this paper we refer to this as \"video device matching\". In open-set video forensics scenarios it is easier to determine if two video sequences were captured with the same device than identifying the specific device. In this paper, we propose a technique for open-set video device matching. Given two H.264 compressed video sequences, our method can determine if they are captured by the same device, even if our method has never "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2210.11549","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2210.11549/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:43:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c2w8esu+wXtTNOohq7CCDexOSOy2ve66M7w/Mnu4O72+hvzP4HH6LAspZxK+8oQkhq2gB/NldLs/q8E+jGqJBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T10:15:30.133665Z"},"content_sha256":"69b6bd05a881f1f4a3ba41eee3ef1b94376d17fc5d15a4e405b19743231b095e","schema_version":"1.0","event_id":"sha256:69b6bd05a881f1f4a3ba41eee3ef1b94376d17fc5d15a4e405b19743231b095e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MZ2X7Z37OF25VFFI2ORFJILYE3/bundle.json","state_url":"https://pith.science/pith/MZ2X7Z37OF25VFFI2ORFJILYE3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MZ2X7Z37OF25VFFI2ORFJILYE3/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-10T10:15:30Z","links":{"resolver":"https://pith.science/pith/MZ2X7Z37OF25VFFI2ORFJILYE3","bundle":"https://pith.science/pith/MZ2X7Z37OF25VFFI2ORFJILYE3/bundle.json","state":"https://pith.science/pith/MZ2X7Z37OF25VFFI2ORFJILYE3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MZ2X7Z37OF25VFFI2ORFJILYE3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:MZ2X7Z37OF25VFFI2ORFJILYE3","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"85b9ae2e9fbebd5743aee6ca2e596a39052b036ab1661848ba0079b08cb1dc5c","cross_cats_sorted":["cs.MM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2022-10-20T19:31:23Z","title_canon_sha256":"295e3e54ec3791d955947ed70b14c0c54850976c2bdb524ec005a91f032c05f0"},"schema_version":"1.0","source":{"id":"2210.11549","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2210.11549","created_at":"2026-07-05T06:43:37Z"},{"alias_kind":"arxiv_version","alias_value":"2210.11549v3","created_at":"2026-07-05T06:43:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2210.11549","created_at":"2026-07-05T06:43:37Z"},{"alias_kind":"pith_short_12","alias_value":"MZ2X7Z37OF25","created_at":"2026-07-05T06:43:37Z"},{"alias_kind":"pith_short_16","alias_value":"MZ2X7Z37OF25VFFI","created_at":"2026-07-05T06:43:37Z"},{"alias_kind":"pith_short_8","alias_value":"MZ2X7Z37","created_at":"2026-07-05T06:43:37Z"}],"graph_snapshots":[{"event_id":"sha256:69b6bd05a881f1f4a3ba41eee3ef1b94376d17fc5d15a4e405b19743231b095e","target":"graph","created_at":"2026-07-05T06:43:37Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2210.11549/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Methods that can determine if two given video sequences are captured by the same device (e.g., mobile telephone or digital camera) can be used in many forensics tasks. In this paper we refer to this as \"video device matching\". In open-set video forensics scenarios it is easier to determine if two video sequences were captured with the same device than identifying the specific device. In this paper, we propose a technique for open-set video device matching. Given two H.264 compressed video sequences, our method can determine if they are captured by the same device, even if our method has never ","authors_text":"Edward J. Delp, Paolo Bestagini, Stefano Tubaro, Ziyue Xiang","cross_cats":["cs.MM"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2022-10-20T19:31:23Z","title":"H4VDM: H.264 Video Device Matching"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2210.11549","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:d95e5e628c35246c9cfa083a610bf02cd56ad334a7ece5d88e8436278482e6cd","target":"record","created_at":"2026-07-05T06:43:37Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"85b9ae2e9fbebd5743aee6ca2e596a39052b036ab1661848ba0079b08cb1dc5c","cross_cats_sorted":["cs.MM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2022-10-20T19:31:23Z","title_canon_sha256":"295e3e54ec3791d955947ed70b14c0c54850976c2bdb524ec005a91f032c05f0"},"schema_version":"1.0","source":{"id":"2210.11549","kind":"arxiv","version":3}},"canonical_sha256":"66757fe77f7175da94a8d3a254a17826e67aecc085dec13857095e631d11848a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"66757fe77f7175da94a8d3a254a17826e67aecc085dec13857095e631d11848a","first_computed_at":"2026-07-05T06:43:37.246252Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:43:37.246252Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"F5pGGVwqeB+4nrlmcMW5USFXNhqf2Qn0CNQoYHZlGN0dpwSx2CwYXPUt7YVbmraqn3RWM+gsdiLDviuHR4qYCw==","signature_status":"signed_v1","signed_at":"2026-07-05T06:43:37.246708Z","signed_message":"canonical_sha256_bytes"},"source_id":"2210.11549","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d95e5e628c35246c9cfa083a610bf02cd56ad334a7ece5d88e8436278482e6cd","sha256:69b6bd05a881f1f4a3ba41eee3ef1b94376d17fc5d15a4e405b19743231b095e"],"state_sha256":"11d0632e03790680c4f14cf05baec26880e92753863d1fa5d7f622038f36d35e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SUScZqCH0RhbVHCFLEy18TjvSheW7Ofgb7s2McL/aj8vl2Q0nlxDAVi+ol9o3p19zR2DciEjuSv5w47hTxGIDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-10T10:15:30.135713Z","bundle_sha256":"746d2443be8394ddcd8e30975fc7292f5a32cd33c7a447be7c510bc5dbd911f7"}}