{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:6KXK3X24VFN57SEPHUM4XV5HMQ","short_pith_number":"pith:6KXK3X24","canonical_record":{"source":{"id":"2504.17312","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-04-24T07:13:32Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"e03ba8ffe6ee96113f2f1c38db085899f4dbd45588801a95c0ed2558f791a118","abstract_canon_sha256":"6505f673e87b1d17ce1388666a1362ba5136c22f62e460fca4f1e97de1f604ae"},"schema_version":"1.0"},"canonical_sha256":"f2aeaddf5ca95bdfc88f3d19cbd7a76430667efa600751e80f00e9b5345d0531","source":{"kind":"arxiv","id":"2504.17312","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.17312","created_at":"2026-07-05T11:44:04Z"},{"alias_kind":"arxiv_version","alias_value":"2504.17312v1","created_at":"2026-07-05T11:44:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.17312","created_at":"2026-07-05T11:44:04Z"},{"alias_kind":"pith_short_12","alias_value":"6KXK3X24VFN5","created_at":"2026-07-05T11:44:04Z"},{"alias_kind":"pith_short_16","alias_value":"6KXK3X24VFN57SEP","created_at":"2026-07-05T11:44:04Z"},{"alias_kind":"pith_short_8","alias_value":"6KXK3X24","created_at":"2026-07-05T11:44:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:6KXK3X24VFN57SEPHUM4XV5HMQ","target":"record","payload":{"canonical_record":{"source":{"id":"2504.17312","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-04-24T07:13:32Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"e03ba8ffe6ee96113f2f1c38db085899f4dbd45588801a95c0ed2558f791a118","abstract_canon_sha256":"6505f673e87b1d17ce1388666a1362ba5136c22f62e460fca4f1e97de1f604ae"},"schema_version":"1.0"},"canonical_sha256":"f2aeaddf5ca95bdfc88f3d19cbd7a76430667efa600751e80f00e9b5345d0531","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:44:04.669877Z","signature_b64":"DGUPliHvcOutXxnyxpBq1/2qYOq+pnN1eVl9vv6XQtljTvnuNgpN0B9hjEiLFTK1ogv+O1z3YJf3bNcXVuMyDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f2aeaddf5ca95bdfc88f3d19cbd7a76430667efa600751e80f00e9b5345d0531","last_reissued_at":"2026-07-05T11:44:04.669359Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:44:04.669359Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.17312","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":"2026-07-05T11:44:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6Opp2GviAXiz7YFKoyDvDB3R/66UGQYCIVAGdYK4j57jxQ2vSH+vvm1U4JTro52ChiIqRh1GUY0WNTNl84IoDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T20:13:39.035885Z"},"content_sha256":"21c2f769d33184ce7c42c8384f5e81fdbd3ab9de2dcf9afa2181c116d82c47ef","schema_version":"1.0","event_id":"sha256:21c2f769d33184ce7c42c8384f5e81fdbd3ab9de2dcf9afa2181c116d82c47ef"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:6KXK3X24VFN57SEPHUM4XV5HMQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum diamond microscopy of individual vaterite microspheres containing magnetite nanoparticles","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"physics.bio-ph","authors_text":"Hani Barhum, Ilja Fescenko, Janis Alnis, Mohammad Attrash, Mona Jani, Nir Bar-Gill, Pavel Ginzburg, Tamara Amro, Toms Salgals","submitted_at":"2025-04-24T07:13:32Z","abstract_excerpt":"Biocompatible vaterite microspheres, renowned for their porous structure, are promising carriers for magnetic nanoparticles (MNPs) in biomedical applications such as targeted drug delivery and diagnostic imaging. Precise control over the magnetic moment of individual microspheres is crucial for these applications. This study employs widefield quantum diamond microscopy to map the stray magnetic fields of individual vaterite microspheres (3-10 um) loaded with Fe3O4 MNPs of varying sizes (5 nm, 10 nm, and 20 nm). By analyzing over 35 microspheres under a 222 mT external magnetizing field, we mea"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.17312","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2504.17312/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":"2026-07-05T11:44:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FOd0wnxOoIWbsspoEMoSDsp2PRqQeNTHfoPeUMxWopCJlpd30xUX43fDfSBt8G60bPqrMgDFBbHYUmca3C4kAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T20:13:39.036393Z"},"content_sha256":"91edb80c3b82232f253394c17af251c1e422e94d59545219ca6699c96d0487c2","schema_version":"1.0","event_id":"sha256:91edb80c3b82232f253394c17af251c1e422e94d59545219ca6699c96d0487c2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6KXK3X24VFN57SEPHUM4XV5HMQ/bundle.json","state_url":"https://pith.science/pith/6KXK3X24VFN57SEPHUM4XV5HMQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6KXK3X24VFN57SEPHUM4XV5HMQ/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":"2026-08-15T20:13:39Z","links":{"resolver":"https://pith.science/pith/6KXK3X24VFN57SEPHUM4XV5HMQ","bundle":"https://pith.science/pith/6KXK3X24VFN57SEPHUM4XV5HMQ/bundle.json","state":"https://pith.science/pith/6KXK3X24VFN57SEPHUM4XV5HMQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6KXK3X24VFN57SEPHUM4XV5HMQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:6KXK3X24VFN57SEPHUM4XV5HMQ","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":"6505f673e87b1d17ce1388666a1362ba5136c22f62e460fca4f1e97de1f604ae","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-04-24T07:13:32Z","title_canon_sha256":"e03ba8ffe6ee96113f2f1c38db085899f4dbd45588801a95c0ed2558f791a118"},"schema_version":"1.0","source":{"id":"2504.17312","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.17312","created_at":"2026-07-05T11:44:04Z"},{"alias_kind":"arxiv_version","alias_value":"2504.17312v1","created_at":"2026-07-05T11:44:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.17312","created_at":"2026-07-05T11:44:04Z"},{"alias_kind":"pith_short_12","alias_value":"6KXK3X24VFN5","created_at":"2026-07-05T11:44:04Z"},{"alias_kind":"pith_short_16","alias_value":"6KXK3X24VFN57SEP","created_at":"2026-07-05T11:44:04Z"},{"alias_kind":"pith_short_8","alias_value":"6KXK3X24","created_at":"2026-07-05T11:44:04Z"}],"graph_snapshots":[{"event_id":"sha256:91edb80c3b82232f253394c17af251c1e422e94d59545219ca6699c96d0487c2","target":"graph","created_at":"2026-07-05T11:44:04Z","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/2504.17312/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Biocompatible vaterite microspheres, renowned for their porous structure, are promising carriers for magnetic nanoparticles (MNPs) in biomedical applications such as targeted drug delivery and diagnostic imaging. Precise control over the magnetic moment of individual microspheres is crucial for these applications. This study employs widefield quantum diamond microscopy to map the stray magnetic fields of individual vaterite microspheres (3-10 um) loaded with Fe3O4 MNPs of varying sizes (5 nm, 10 nm, and 20 nm). By analyzing over 35 microspheres under a 222 mT external magnetizing field, we mea","authors_text":"Hani Barhum, Ilja Fescenko, Janis Alnis, Mohammad Attrash, Mona Jani, Nir Bar-Gill, Pavel Ginzburg, Tamara Amro, Toms Salgals","cross_cats":["physics.app-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-04-24T07:13:32Z","title":"Quantum diamond microscopy of individual vaterite microspheres containing magnetite nanoparticles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.17312","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":"sha256:21c2f769d33184ce7c42c8384f5e81fdbd3ab9de2dcf9afa2181c116d82c47ef","target":"record","created_at":"2026-07-05T11:44:04Z","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":"6505f673e87b1d17ce1388666a1362ba5136c22f62e460fca4f1e97de1f604ae","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-04-24T07:13:32Z","title_canon_sha256":"e03ba8ffe6ee96113f2f1c38db085899f4dbd45588801a95c0ed2558f791a118"},"schema_version":"1.0","source":{"id":"2504.17312","kind":"arxiv","version":1}},"canonical_sha256":"f2aeaddf5ca95bdfc88f3d19cbd7a76430667efa600751e80f00e9b5345d0531","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f2aeaddf5ca95bdfc88f3d19cbd7a76430667efa600751e80f00e9b5345d0531","first_computed_at":"2026-07-05T11:44:04.669359Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:44:04.669359Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DGUPliHvcOutXxnyxpBq1/2qYOq+pnN1eVl9vv6XQtljTvnuNgpN0B9hjEiLFTK1ogv+O1z3YJf3bNcXVuMyDw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:44:04.669877Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.17312","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:21c2f769d33184ce7c42c8384f5e81fdbd3ab9de2dcf9afa2181c116d82c47ef","sha256:91edb80c3b82232f253394c17af251c1e422e94d59545219ca6699c96d0487c2"],"state_sha256":"13c6a80101d140976fffffed80b54daa0126db8d25d895cc1817d6fcd63f11a2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UcgxA4Bg16MAZrq61g09IXmb/nh7v6VmGQzVEEJt+5c+EDu/QTo2IkQOiq2pCwx6yImISoo1E2dXUzUkM/VKBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T20:13:39.040085Z","bundle_sha256":"5f9daadbf19bfca950e966c9ce1b6cf5dec4c50e1f0632a3ca1b65bd0da4ebd5"}}