{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:WQCHB2LBME5BTLEPB2SDV3BT6L","short_pith_number":"pith:WQCHB2LB","canonical_record":{"source":{"id":"2506.04011","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-06-04T14:37:43Z","cross_cats_sorted":[],"title_canon_sha256":"f2115cfc7699f3dde04b71dae36813dd662095ae72a58734dc66eb4dc742b34d","abstract_canon_sha256":"cc0ee392fba27cac89d57172e36db7a6f428615c103ce5755854ceeca3c2ecde"},"schema_version":"1.0"},"canonical_sha256":"b40470e961613a19ac8f0ea43aec33f2c17fdc6483dfa238876f61427f35ad2a","source":{"kind":"arxiv","id":"2506.04011","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.04011","created_at":"2026-07-05T11:15:55Z"},{"alias_kind":"arxiv_version","alias_value":"2506.04011v1","created_at":"2026-07-05T11:15:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.04011","created_at":"2026-07-05T11:15:55Z"},{"alias_kind":"pith_short_12","alias_value":"WQCHB2LBME5B","created_at":"2026-07-05T11:15:55Z"},{"alias_kind":"pith_short_16","alias_value":"WQCHB2LBME5BTLEP","created_at":"2026-07-05T11:15:55Z"},{"alias_kind":"pith_short_8","alias_value":"WQCHB2LB","created_at":"2026-07-05T11:15:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:WQCHB2LBME5BTLEPB2SDV3BT6L","target":"record","payload":{"canonical_record":{"source":{"id":"2506.04011","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-06-04T14:37:43Z","cross_cats_sorted":[],"title_canon_sha256":"f2115cfc7699f3dde04b71dae36813dd662095ae72a58734dc66eb4dc742b34d","abstract_canon_sha256":"cc0ee392fba27cac89d57172e36db7a6f428615c103ce5755854ceeca3c2ecde"},"schema_version":"1.0"},"canonical_sha256":"b40470e961613a19ac8f0ea43aec33f2c17fdc6483dfa238876f61427f35ad2a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:15:55.339728Z","signature_b64":"vuWSRmLGh6MaYa32zB1kOTnYlrPYso2AvXpNlf0UGCb11Fuo76AFyCy4KAdls7jym2Qa6B2uadlsdE4v2punCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b40470e961613a19ac8f0ea43aec33f2c17fdc6483dfa238876f61427f35ad2a","last_reissued_at":"2026-07-05T11:15:55.339229Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:15:55.339229Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.04011","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":"2026-07-05T11:15:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZXxZMDZlRdDIRR5JHPGlEqUpYxr1pNdC9pN/v0XHslHo1WO8/TfjWPeQ4qmQ23r+x+COfEOFUC0QijKTb65uAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T00:38:23.443494Z"},"content_sha256":"f1af8c2020f661174dd495c2a655eadcc3452343f26ab2af4316d8bbfcc12061","schema_version":"1.0","event_id":"sha256:f1af8c2020f661174dd495c2a655eadcc3452343f26ab2af4316d8bbfcc12061"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:WQCHB2LBME5BTLEPB2SDV3BT6L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Image-based physical characterization of magnetotactic bacteria from an environmental sample","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.bio-ph","authors_text":"Agnese Kokina, Andrejs Cebers, Damien Faivre, Davids Fridmanis, Dita Gudra, Guntars Kitenbergs, Janis Liepins, Mara Smite, Megija Lunge, Mihails Birjukovs, Mihaly Posfai, Mila Sirinelli-Kojadinovic, Sandrine Grosse","submitted_at":"2025-06-04T14:37:43Z","abstract_excerpt":"Magnetotactic bacteria (MTB) are a diverse group of microorganisms that are able to biomineralize magnetic nanoparticles. Most MTB remain uncultured, making population-level characterization from natural environments difficult. We report the discovery of a new and diverse MTB-rich site in the Ogre River, Latvia, and present an integrated approach combining 16S rRNA sequencing, transmission electron microscopy, and novel open-source, automated image-based physical methods to characterize bacteria populations within environmental samples. We introduce a pipeline for cell velocimetry using a stat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.04011","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/2506.04011/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":"2026-07-05T11:15:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ReYGup+mZ+TqtqnRBE6UhGbesZraHtuAdNNmKvLPKqjXQjsLQe7aeuAGoe+aTbhsbjVK3wLkllDnCiKneVUXDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T00:38:23.444037Z"},"content_sha256":"cf2382cdb562a8ec038ccbf387720cf89558462e7069d627d85d1424b7efcebe","schema_version":"1.0","event_id":"sha256:cf2382cdb562a8ec038ccbf387720cf89558462e7069d627d85d1424b7efcebe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WQCHB2LBME5BTLEPB2SDV3BT6L/bundle.json","state_url":"https://pith.science/pith/WQCHB2LBME5BTLEPB2SDV3BT6L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WQCHB2LBME5BTLEPB2SDV3BT6L/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":"2026-08-08T00:38:23Z","links":{"resolver":"https://pith.science/pith/WQCHB2LBME5BTLEPB2SDV3BT6L","bundle":"https://pith.science/pith/WQCHB2LBME5BTLEPB2SDV3BT6L/bundle.json","state":"https://pith.science/pith/WQCHB2LBME5BTLEPB2SDV3BT6L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WQCHB2LBME5BTLEPB2SDV3BT6L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:WQCHB2LBME5BTLEPB2SDV3BT6L","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":"cc0ee392fba27cac89d57172e36db7a6f428615c103ce5755854ceeca3c2ecde","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-06-04T14:37:43Z","title_canon_sha256":"f2115cfc7699f3dde04b71dae36813dd662095ae72a58734dc66eb4dc742b34d"},"schema_version":"1.0","source":{"id":"2506.04011","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.04011","created_at":"2026-07-05T11:15:55Z"},{"alias_kind":"arxiv_version","alias_value":"2506.04011v1","created_at":"2026-07-05T11:15:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.04011","created_at":"2026-07-05T11:15:55Z"},{"alias_kind":"pith_short_12","alias_value":"WQCHB2LBME5B","created_at":"2026-07-05T11:15:55Z"},{"alias_kind":"pith_short_16","alias_value":"WQCHB2LBME5BTLEP","created_at":"2026-07-05T11:15:55Z"},{"alias_kind":"pith_short_8","alias_value":"WQCHB2LB","created_at":"2026-07-05T11:15:55Z"}],"graph_snapshots":[{"event_id":"sha256:cf2382cdb562a8ec038ccbf387720cf89558462e7069d627d85d1424b7efcebe","target":"graph","created_at":"2026-07-05T11:15:55Z","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/2506.04011/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Magnetotactic bacteria (MTB) are a diverse group of microorganisms that are able to biomineralize magnetic nanoparticles. Most MTB remain uncultured, making population-level characterization from natural environments difficult. We report the discovery of a new and diverse MTB-rich site in the Ogre River, Latvia, and present an integrated approach combining 16S rRNA sequencing, transmission electron microscopy, and novel open-source, automated image-based physical methods to characterize bacteria populations within environmental samples. We introduce a pipeline for cell velocimetry using a stat","authors_text":"Agnese Kokina, Andrejs Cebers, Damien Faivre, Davids Fridmanis, Dita Gudra, Guntars Kitenbergs, Janis Liepins, Mara Smite, Megija Lunge, Mihails Birjukovs, Mihaly Posfai, Mila Sirinelli-Kojadinovic, Sandrine Grosse","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-06-04T14:37:43Z","title":"Image-based physical characterization of magnetotactic bacteria from an environmental sample"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.04011","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:f1af8c2020f661174dd495c2a655eadcc3452343f26ab2af4316d8bbfcc12061","target":"record","created_at":"2026-07-05T11:15:55Z","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":"cc0ee392fba27cac89d57172e36db7a6f428615c103ce5755854ceeca3c2ecde","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-06-04T14:37:43Z","title_canon_sha256":"f2115cfc7699f3dde04b71dae36813dd662095ae72a58734dc66eb4dc742b34d"},"schema_version":"1.0","source":{"id":"2506.04011","kind":"arxiv","version":1}},"canonical_sha256":"b40470e961613a19ac8f0ea43aec33f2c17fdc6483dfa238876f61427f35ad2a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b40470e961613a19ac8f0ea43aec33f2c17fdc6483dfa238876f61427f35ad2a","first_computed_at":"2026-07-05T11:15:55.339229Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:15:55.339229Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vuWSRmLGh6MaYa32zB1kOTnYlrPYso2AvXpNlf0UGCb11Fuo76AFyCy4KAdls7jym2Qa6B2uadlsdE4v2punCw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:15:55.339728Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.04011","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f1af8c2020f661174dd495c2a655eadcc3452343f26ab2af4316d8bbfcc12061","sha256:cf2382cdb562a8ec038ccbf387720cf89558462e7069d627d85d1424b7efcebe"],"state_sha256":"dbafede448d7d8ae8468f7e561e0d92edcd5a6e5f0cadf2153f63b4ec6ba5862"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hwq4agyE9h5Hz1i0GgA/y/FS/y/8CET9oP/3aNE6/mWff8J1WvCd5fawkDztSTL/Y7H3vOac49mrntar+s0nCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T00:38:23.447859Z","bundle_sha256":"5d2ddb929af09229d874772f7bc66ef8a2d12a3bd25f189fdf35af86b0a794d0"}}