{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:6RH5DF4FU6SSJCOSSACXAIZSZN","short_pith_number":"pith:6RH5DF4F","canonical_record":{"source":{"id":"1209.4030","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2012-09-18T16:52:42Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"728d8f857bcc2f408c57b9e027a4f6f2cc7f0b762710e8286ce6001cf7faeb99","abstract_canon_sha256":"4e46702d031ddc2814afd86c440ee7b9edc8b1969fa98b79238abe26f8bbec54"},"schema_version":"1.0"},"canonical_sha256":"f44fd19785a7a52489d29005702332cb60cd7c723f189b0900740509564aad41","source":{"kind":"arxiv","id":"1209.4030","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.4030","created_at":"2026-05-18T03:21:31Z"},{"alias_kind":"arxiv_version","alias_value":"1209.4030v1","created_at":"2026-05-18T03:21:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.4030","created_at":"2026-05-18T03:21:31Z"},{"alias_kind":"pith_short_12","alias_value":"6RH5DF4FU6SS","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"6RH5DF4FU6SSJCOS","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"6RH5DF4F","created_at":"2026-05-18T12:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:6RH5DF4FU6SSJCOSSACXAIZSZN","target":"record","payload":{"canonical_record":{"source":{"id":"1209.4030","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2012-09-18T16:52:42Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"728d8f857bcc2f408c57b9e027a4f6f2cc7f0b762710e8286ce6001cf7faeb99","abstract_canon_sha256":"4e46702d031ddc2814afd86c440ee7b9edc8b1969fa98b79238abe26f8bbec54"},"schema_version":"1.0"},"canonical_sha256":"f44fd19785a7a52489d29005702332cb60cd7c723f189b0900740509564aad41","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:21:31.606040Z","signature_b64":"1Ap8a5hVIswORtnk5QkXqwgZ3PgxHH2fW/NjhTveLrnF2c/xDpmoR8gjRmQ6IrBmeAa3mweAi9I3dZrFmfzLBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f44fd19785a7a52489d29005702332cb60cd7c723f189b0900740509564aad41","last_reissued_at":"2026-05-18T03:21:31.605658Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:21:31.605658Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.4030","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":"2026-05-18T03:21:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RGT/DcaNDxxK/oT8d4G+AXbyIlknVPtgJcFmX5rigLab4Mb28dqigWLZuxE5aa1KoOrmASylOwdEaTT8LMIgDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T21:00:06.306353Z"},"content_sha256":"41d446057fd0e3723dbd8164ae6e9b27c1b811c86f36969ff565977c96e6e1ee","schema_version":"1.0","event_id":"sha256:41d446057fd0e3723dbd8164ae6e9b27c1b811c86f36969ff565977c96e6e1ee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:6RH5DF4FU6SSJCOSSACXAIZSZN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Long Lived NMR Signal in Bone","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"physics.med-ph","authors_text":"Alexej Jerschow, Anatoly Khitrin, Boyang Zhang, Jae-Seung Lee","submitted_at":"2012-09-18T16:52:42Z","abstract_excerpt":"Solids and rigid tissues such as bone, ligaments, and tendons, typically appear dark in magnetic resonance imaging (MRI), which is due to the extremely short-lived proton nuclear magnetic resonance (NMR) signals. This short lifetime is due to strong dipolar interactions between immobilized proton spins, which render it challenging to detect these signals with sufficient resolution and sensitivity. Here we show the possibility of exciting long-lived signals in cortical bone tissue with a signature consistent with that of bound water signals. Contrary to long-standing belief, it is further shown"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.4030","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":"2026-05-18T03:21:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wQw9LW+Gwo7m32kPPHIKONIO3srpstNxnKKsbbetp3r9ksGTHGpRYD04gLWV1m3wA0lMQZ90BqrLi35CglUBDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T21:00:06.306704Z"},"content_sha256":"d6532094b298ff716d0a63330126298eebfa517377e3dc961c3356f8374e794e","schema_version":"1.0","event_id":"sha256:d6532094b298ff716d0a63330126298eebfa517377e3dc961c3356f8374e794e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6RH5DF4FU6SSJCOSSACXAIZSZN/bundle.json","state_url":"https://pith.science/pith/6RH5DF4FU6SSJCOSSACXAIZSZN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6RH5DF4FU6SSJCOSSACXAIZSZN/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":"2026-07-01T21:00:06Z","links":{"resolver":"https://pith.science/pith/6RH5DF4FU6SSJCOSSACXAIZSZN","bundle":"https://pith.science/pith/6RH5DF4FU6SSJCOSSACXAIZSZN/bundle.json","state":"https://pith.science/pith/6RH5DF4FU6SSJCOSSACXAIZSZN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6RH5DF4FU6SSJCOSSACXAIZSZN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:6RH5DF4FU6SSJCOSSACXAIZSZN","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":"4e46702d031ddc2814afd86c440ee7b9edc8b1969fa98b79238abe26f8bbec54","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2012-09-18T16:52:42Z","title_canon_sha256":"728d8f857bcc2f408c57b9e027a4f6f2cc7f0b762710e8286ce6001cf7faeb99"},"schema_version":"1.0","source":{"id":"1209.4030","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.4030","created_at":"2026-05-18T03:21:31Z"},{"alias_kind":"arxiv_version","alias_value":"1209.4030v1","created_at":"2026-05-18T03:21:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.4030","created_at":"2026-05-18T03:21:31Z"},{"alias_kind":"pith_short_12","alias_value":"6RH5DF4FU6SS","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"6RH5DF4FU6SSJCOS","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"6RH5DF4F","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:d6532094b298ff716d0a63330126298eebfa517377e3dc961c3356f8374e794e","target":"graph","created_at":"2026-05-18T03:21:31Z","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":"Solids and rigid tissues such as bone, ligaments, and tendons, typically appear dark in magnetic resonance imaging (MRI), which is due to the extremely short-lived proton nuclear magnetic resonance (NMR) signals. This short lifetime is due to strong dipolar interactions between immobilized proton spins, which render it challenging to detect these signals with sufficient resolution and sensitivity. Here we show the possibility of exciting long-lived signals in cortical bone tissue with a signature consistent with that of bound water signals. Contrary to long-standing belief, it is further shown","authors_text":"Alexej Jerschow, Anatoly Khitrin, Boyang Zhang, Jae-Seung Lee","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2012-09-18T16:52:42Z","title":"Long Lived NMR Signal in Bone"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.4030","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":"sha256:41d446057fd0e3723dbd8164ae6e9b27c1b811c86f36969ff565977c96e6e1ee","target":"record","created_at":"2026-05-18T03:21:31Z","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":"4e46702d031ddc2814afd86c440ee7b9edc8b1969fa98b79238abe26f8bbec54","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2012-09-18T16:52:42Z","title_canon_sha256":"728d8f857bcc2f408c57b9e027a4f6f2cc7f0b762710e8286ce6001cf7faeb99"},"schema_version":"1.0","source":{"id":"1209.4030","kind":"arxiv","version":1}},"canonical_sha256":"f44fd19785a7a52489d29005702332cb60cd7c723f189b0900740509564aad41","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f44fd19785a7a52489d29005702332cb60cd7c723f189b0900740509564aad41","first_computed_at":"2026-05-18T03:21:31.605658Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:21:31.605658Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1Ap8a5hVIswORtnk5QkXqwgZ3PgxHH2fW/NjhTveLrnF2c/xDpmoR8gjRmQ6IrBmeAa3mweAi9I3dZrFmfzLBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:21:31.606040Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.4030","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:41d446057fd0e3723dbd8164ae6e9b27c1b811c86f36969ff565977c96e6e1ee","sha256:d6532094b298ff716d0a63330126298eebfa517377e3dc961c3356f8374e794e"],"state_sha256":"75f120210525ce5ec721fbebd1eae56ba7cbfc30460e2aae303ccb0110dd19e9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ARLjaxho5Gy0BNsgEIhdhXZHFmX7fkVstnC8NmBQ4O7xuVG+S5KbAHO4QNGhLTiKwiTDQV0JdDYTZ4HxgYQbDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-01T21:00:06.308637Z","bundle_sha256":"c82283f6788f1be898344ebc8f2b0163a2a4bee99a972259d6223b84ec550168"}}