{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:HFYW6MDBJP57T3C7YVIUGCIQZO","short_pith_number":"pith:HFYW6MDB","canonical_record":{"source":{"id":"1303.2211","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2013-03-09T14:08:23Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"d113538c933661f01e67f23f55a1a605fe977b8dc3a2a66347d0a35e7a91618a","abstract_canon_sha256":"0edf8140fb490fef8b2ea2c4f5679bd5dc2916b8ce13357394c051b021109a4e"},"schema_version":"1.0"},"canonical_sha256":"39716f30614bfbf9ec5fc551430910cb83068e6136d07c6936f349b9b1fe8932","source":{"kind":"arxiv","id":"1303.2211","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.2211","created_at":"2026-05-18T03:31:19Z"},{"alias_kind":"arxiv_version","alias_value":"1303.2211v1","created_at":"2026-05-18T03:31:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.2211","created_at":"2026-05-18T03:31:19Z"},{"alias_kind":"pith_short_12","alias_value":"HFYW6MDBJP57","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HFYW6MDBJP57T3C7","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HFYW6MDB","created_at":"2026-05-18T12:27:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:HFYW6MDBJP57T3C7YVIUGCIQZO","target":"record","payload":{"canonical_record":{"source":{"id":"1303.2211","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2013-03-09T14:08:23Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"d113538c933661f01e67f23f55a1a605fe977b8dc3a2a66347d0a35e7a91618a","abstract_canon_sha256":"0edf8140fb490fef8b2ea2c4f5679bd5dc2916b8ce13357394c051b021109a4e"},"schema_version":"1.0"},"canonical_sha256":"39716f30614bfbf9ec5fc551430910cb83068e6136d07c6936f349b9b1fe8932","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:31:19.676498Z","signature_b64":"mZ+xbK8Ci+5meM8yxmu9u4PyRHWVa7pURPEBU9tHaIop5inHBeksOqvEJnD8qhOO0cjw/d1TGIC9gz+KLAGwDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"39716f30614bfbf9ec5fc551430910cb83068e6136d07c6936f349b9b1fe8932","last_reissued_at":"2026-05-18T03:31:19.675868Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:31:19.675868Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1303.2211","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:31:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RoKzhGHsj59hf6m1eUux7FPP3v60nQaBg9KD5z8M+WfojCn6Hu8oUckTifiWlWKhYBmZQjdEWvodMmcvD43HAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T04:33:27.699099Z"},"content_sha256":"21fa9e06c857279e29fb8a2e62f49f0525f5e6d6758450c9a7a8357413447549","schema_version":"1.0","event_id":"sha256:21fa9e06c857279e29fb8a2e62f49f0525f5e6d6758450c9a7a8357413447549"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:HFYW6MDBJP57T3C7YVIUGCIQZO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Medical Information Embedding in Compressed Watermarked Intravascular Ultrasound Video","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"cs.MM","authors_text":"Achintya Das, Debalina Biswas, Nilanjan Dey, Sheli Sinha Chaudhuri, Suvojit Acharjee","submitted_at":"2013-03-09T14:08:23Z","abstract_excerpt":"In medical field, intravascular ultrasound (IVUS) is a tomographic imaging modality, which can identify the boundaries of different layers of blood vessels. IVUS can detect myocardial infarction (heart attack) that remains ignored and unattended when only angioplasty is done. During the past decade, it became easier for some individuals or groups to copy and transmits digital information without the permission of the owner. For increasing authentication and security of copyrights, digital watermarking, an information hiding technique, was introduced. Achieving watermarking technique with lesse"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.2211","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T03:31:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"glbMTqRLZlGB0Wptwcs/f40gAR2NHrlY9rJ3PjdvqUEKimySzQAOtYNgHJ2lvyj+bONPDgpi8qEt7Nmh3cGCBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T04:33:27.699851Z"},"content_sha256":"90dd8f8097ddc75cf75475c201856dd59cb949eefb11d26e5c28d2a1ee359c87","schema_version":"1.0","event_id":"sha256:90dd8f8097ddc75cf75475c201856dd59cb949eefb11d26e5c28d2a1ee359c87"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HFYW6MDBJP57T3C7YVIUGCIQZO/bundle.json","state_url":"https://pith.science/pith/HFYW6MDBJP57T3C7YVIUGCIQZO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HFYW6MDBJP57T3C7YVIUGCIQZO/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":"2026-06-09T04:33:27Z","links":{"resolver":"https://pith.science/pith/HFYW6MDBJP57T3C7YVIUGCIQZO","bundle":"https://pith.science/pith/HFYW6MDBJP57T3C7YVIUGCIQZO/bundle.json","state":"https://pith.science/pith/HFYW6MDBJP57T3C7YVIUGCIQZO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HFYW6MDBJP57T3C7YVIUGCIQZO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:HFYW6MDBJP57T3C7YVIUGCIQZO","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":"0edf8140fb490fef8b2ea2c4f5679bd5dc2916b8ce13357394c051b021109a4e","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2013-03-09T14:08:23Z","title_canon_sha256":"d113538c933661f01e67f23f55a1a605fe977b8dc3a2a66347d0a35e7a91618a"},"schema_version":"1.0","source":{"id":"1303.2211","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.2211","created_at":"2026-05-18T03:31:19Z"},{"alias_kind":"arxiv_version","alias_value":"1303.2211v1","created_at":"2026-05-18T03:31:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.2211","created_at":"2026-05-18T03:31:19Z"},{"alias_kind":"pith_short_12","alias_value":"HFYW6MDBJP57","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HFYW6MDBJP57T3C7","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HFYW6MDB","created_at":"2026-05-18T12:27:46Z"}],"graph_snapshots":[{"event_id":"sha256:90dd8f8097ddc75cf75475c201856dd59cb949eefb11d26e5c28d2a1ee359c87","target":"graph","created_at":"2026-05-18T03:31:19Z","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"},"paper":{"abstract_excerpt":"In medical field, intravascular ultrasound (IVUS) is a tomographic imaging modality, which can identify the boundaries of different layers of blood vessels. IVUS can detect myocardial infarction (heart attack) that remains ignored and unattended when only angioplasty is done. During the past decade, it became easier for some individuals or groups to copy and transmits digital information without the permission of the owner. For increasing authentication and security of copyrights, digital watermarking, an information hiding technique, was introduced. Achieving watermarking technique with lesse","authors_text":"Achintya Das, Debalina Biswas, Nilanjan Dey, Sheli Sinha Chaudhuri, Suvojit Acharjee","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2013-03-09T14:08:23Z","title":"Medical Information Embedding in Compressed Watermarked Intravascular Ultrasound Video"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.2211","kind":"arxiv","version":1},"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":"sha256:21fa9e06c857279e29fb8a2e62f49f0525f5e6d6758450c9a7a8357413447549","target":"record","created_at":"2026-05-18T03:31:19Z","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":"0edf8140fb490fef8b2ea2c4f5679bd5dc2916b8ce13357394c051b021109a4e","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2013-03-09T14:08:23Z","title_canon_sha256":"d113538c933661f01e67f23f55a1a605fe977b8dc3a2a66347d0a35e7a91618a"},"schema_version":"1.0","source":{"id":"1303.2211","kind":"arxiv","version":1}},"canonical_sha256":"39716f30614bfbf9ec5fc551430910cb83068e6136d07c6936f349b9b1fe8932","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"39716f30614bfbf9ec5fc551430910cb83068e6136d07c6936f349b9b1fe8932","first_computed_at":"2026-05-18T03:31:19.675868Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:31:19.675868Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mZ+xbK8Ci+5meM8yxmu9u4PyRHWVa7pURPEBU9tHaIop5inHBeksOqvEJnD8qhOO0cjw/d1TGIC9gz+KLAGwDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:31:19.676498Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.2211","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:21fa9e06c857279e29fb8a2e62f49f0525f5e6d6758450c9a7a8357413447549","sha256:90dd8f8097ddc75cf75475c201856dd59cb949eefb11d26e5c28d2a1ee359c87"],"state_sha256":"1ba3db6c38ada94ed49c79284d4f58e505006be0ffde3c1fd51877022bd903d3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rfJcG0mJLpFvPj4N0JTpJpRgLLjm5GpeMBk38bjVcBO3mUpH8h4FLPHlxLD4Edf+nCwY0wqgCQDobhyrhrL3CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T04:33:27.703510Z","bundle_sha256":"c6604961f3d70248cce69dadb6c7768e91ac71d26f4a4c002541abb5a1fd95e7"}}