{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:EMXCQS4DMXCT5X5XJG3LRUNNRX","short_pith_number":"pith:EMXCQS4D","canonical_record":{"source":{"id":"1102.5359","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2011-02-25T21:57:30Z","cross_cats_sorted":["q-bio.BM"],"title_canon_sha256":"fdd7a926196cc124688d34cd7bd039d1ebe02b257ff0fce43142786e7e2ce41c","abstract_canon_sha256":"46fefba04f6857be0dc4230ee3f4e7c59b7cd47d29618668b04ed7e4afba5546"},"schema_version":"1.0"},"canonical_sha256":"232e284b8365c53edfb749b6b8d1ad8dc92f7038de1d6be022925fedfbed335a","source":{"kind":"arxiv","id":"1102.5359","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.5359","created_at":"2026-05-18T04:10:56Z"},{"alias_kind":"arxiv_version","alias_value":"1102.5359v2","created_at":"2026-05-18T04:10:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.5359","created_at":"2026-05-18T04:10:56Z"},{"alias_kind":"pith_short_12","alias_value":"EMXCQS4DMXCT","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EMXCQS4DMXCT5X5X","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EMXCQS4D","created_at":"2026-05-18T12:26:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:EMXCQS4DMXCT5X5XJG3LRUNNRX","target":"record","payload":{"canonical_record":{"source":{"id":"1102.5359","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2011-02-25T21:57:30Z","cross_cats_sorted":["q-bio.BM"],"title_canon_sha256":"fdd7a926196cc124688d34cd7bd039d1ebe02b257ff0fce43142786e7e2ce41c","abstract_canon_sha256":"46fefba04f6857be0dc4230ee3f4e7c59b7cd47d29618668b04ed7e4afba5546"},"schema_version":"1.0"},"canonical_sha256":"232e284b8365c53edfb749b6b8d1ad8dc92f7038de1d6be022925fedfbed335a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:10:56.851021Z","signature_b64":"5CbYNTghKBfq28MwnJ1lb+FHB2P+sulQkoftPWXnNFXajKERIxiDDX57xiH6xm9H4KBvWI8P7CjXPLI1eLgKDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"232e284b8365c53edfb749b6b8d1ad8dc92f7038de1d6be022925fedfbed335a","last_reissued_at":"2026-05-18T04:10:56.850505Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:10:56.850505Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1102.5359","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:10:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GKgoFTWEUBaDJP4HPNDK088neW77t5b3/qGHVfGA6j0ZaAZw91WbvSyFdnGLet57SHGnNQ2OQF7ucpCR1PtFCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T00:36:14.181996Z"},"content_sha256":"fd166e7651e03449264568c6469f3f396d3ed8df61773435326bfc7093febcb1","schema_version":"1.0","event_id":"sha256:fd166e7651e03449264568c6469f3f396d3ed8df61773435326bfc7093febcb1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:EMXCQS4DMXCT5X5XJG3LRUNNRX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mechanism of magnetic field effect in cryptochrome","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["q-bio.BM"],"primary_cat":"physics.bio-ph","authors_text":"Ilia A. Solov'yov, Klaus Schulten","submitted_at":"2011-02-25T21:57:30Z","abstract_excerpt":"Creatures as varied as mammals, fish, insects, reptiles, and migratory birds have an intriguing `sixth' sense that allows them to distinguish north from south by using the Earth's intrinsic magnetic field. Yet despite decades of study, the physical basis of this magnetic sense remains elusive. A likely mechanism is furnished by magnetically sensitive radical pair reactions occurring in the retina, the light-sensitive part of the eyes. A photoreceptor, cryptochrome, has been suggested to endow birds with magnetoreceptive abilities as the protein has been shown to exhibit the biophysical propert"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.5359","kind":"arxiv","version":2},"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":"2026-05-18T04:10:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U9n4ANiiaQ2e9O0SGv4b+X/gepF1dT91D59iR3FBpoG6aZRgTVYrr6Fg3d8HEB/dtYNwHiIOc1tuMmR1S8AwAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T00:36:14.182537Z"},"content_sha256":"aa4d632bbe496c47840e1a19a437febbaa484bad603f30407967c81cf88cb016","schema_version":"1.0","event_id":"sha256:aa4d632bbe496c47840e1a19a437febbaa484bad603f30407967c81cf88cb016"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EMXCQS4DMXCT5X5XJG3LRUNNRX/bundle.json","state_url":"https://pith.science/pith/EMXCQS4DMXCT5X5XJG3LRUNNRX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EMXCQS4DMXCT5X5XJG3LRUNNRX/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":"2026-05-24T00:36:14Z","links":{"resolver":"https://pith.science/pith/EMXCQS4DMXCT5X5XJG3LRUNNRX","bundle":"https://pith.science/pith/EMXCQS4DMXCT5X5XJG3LRUNNRX/bundle.json","state":"https://pith.science/pith/EMXCQS4DMXCT5X5XJG3LRUNNRX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EMXCQS4DMXCT5X5XJG3LRUNNRX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:EMXCQS4DMXCT5X5XJG3LRUNNRX","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":"46fefba04f6857be0dc4230ee3f4e7c59b7cd47d29618668b04ed7e4afba5546","cross_cats_sorted":["q-bio.BM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2011-02-25T21:57:30Z","title_canon_sha256":"fdd7a926196cc124688d34cd7bd039d1ebe02b257ff0fce43142786e7e2ce41c"},"schema_version":"1.0","source":{"id":"1102.5359","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.5359","created_at":"2026-05-18T04:10:56Z"},{"alias_kind":"arxiv_version","alias_value":"1102.5359v2","created_at":"2026-05-18T04:10:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.5359","created_at":"2026-05-18T04:10:56Z"},{"alias_kind":"pith_short_12","alias_value":"EMXCQS4DMXCT","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EMXCQS4DMXCT5X5X","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EMXCQS4D","created_at":"2026-05-18T12:26:28Z"}],"graph_snapshots":[{"event_id":"sha256:aa4d632bbe496c47840e1a19a437febbaa484bad603f30407967c81cf88cb016","target":"graph","created_at":"2026-05-18T04:10:56Z","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":"Creatures as varied as mammals, fish, insects, reptiles, and migratory birds have an intriguing `sixth' sense that allows them to distinguish north from south by using the Earth's intrinsic magnetic field. Yet despite decades of study, the physical basis of this magnetic sense remains elusive. A likely mechanism is furnished by magnetically sensitive radical pair reactions occurring in the retina, the light-sensitive part of the eyes. A photoreceptor, cryptochrome, has been suggested to endow birds with magnetoreceptive abilities as the protein has been shown to exhibit the biophysical propert","authors_text":"Ilia A. Solov'yov, Klaus Schulten","cross_cats":["q-bio.BM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2011-02-25T21:57:30Z","title":"Mechanism of magnetic field effect in cryptochrome"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.5359","kind":"arxiv","version":2},"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:fd166e7651e03449264568c6469f3f396d3ed8df61773435326bfc7093febcb1","target":"record","created_at":"2026-05-18T04:10:56Z","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":"46fefba04f6857be0dc4230ee3f4e7c59b7cd47d29618668b04ed7e4afba5546","cross_cats_sorted":["q-bio.BM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2011-02-25T21:57:30Z","title_canon_sha256":"fdd7a926196cc124688d34cd7bd039d1ebe02b257ff0fce43142786e7e2ce41c"},"schema_version":"1.0","source":{"id":"1102.5359","kind":"arxiv","version":2}},"canonical_sha256":"232e284b8365c53edfb749b6b8d1ad8dc92f7038de1d6be022925fedfbed335a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"232e284b8365c53edfb749b6b8d1ad8dc92f7038de1d6be022925fedfbed335a","first_computed_at":"2026-05-18T04:10:56.850505Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:10:56.850505Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5CbYNTghKBfq28MwnJ1lb+FHB2P+sulQkoftPWXnNFXajKERIxiDDX57xiH6xm9H4KBvWI8P7CjXPLI1eLgKDg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:10:56.851021Z","signed_message":"canonical_sha256_bytes"},"source_id":"1102.5359","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fd166e7651e03449264568c6469f3f396d3ed8df61773435326bfc7093febcb1","sha256:aa4d632bbe496c47840e1a19a437febbaa484bad603f30407967c81cf88cb016"],"state_sha256":"ebfd18aba02c469436863846f34f1247ed6948bf9a479ff93f12f3768546acec"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PuULq6e3qpSIBXwUNHSF1mrL3IZIhtI91hONteRXPJph21NbamkjwquDbMOAxxwlErkEoDH4bS0tj+VoWdnuAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T00:36:14.186104Z","bundle_sha256":"97f04f405b2e9af14a065eebae91f26d51e53bcaf566f5eeadb44f6cb164a1cf"}}