{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:BQ6Y2MZBJ75N3T3TOBVA7GMOET","short_pith_number":"pith:BQ6Y2MZB","canonical_record":{"source":{"id":"1201.4519","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-01-21T23:23:09Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"0ae461855040d05e8c374d2994eaec418ff4e568ad908791e86f14c52c723bc8","abstract_canon_sha256":"5db8f8df0552568cfa750e9c62e9217417838152e718ad46d1ba7b61190f206d"},"schema_version":"1.0"},"canonical_sha256":"0c3d8d33214ffaddcf73706a0f998e24eae7a94dca2908a1f2f632b55472fec9","source":{"kind":"arxiv","id":"1201.4519","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.4519","created_at":"2026-05-18T01:58:43Z"},{"alias_kind":"arxiv_version","alias_value":"1201.4519v2","created_at":"2026-05-18T01:58:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.4519","created_at":"2026-05-18T01:58:43Z"},{"alias_kind":"pith_short_12","alias_value":"BQ6Y2MZBJ75N","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"BQ6Y2MZBJ75N3T3T","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"BQ6Y2MZB","created_at":"2026-05-18T12:27:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:BQ6Y2MZBJ75N3T3TOBVA7GMOET","target":"record","payload":{"canonical_record":{"source":{"id":"1201.4519","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-01-21T23:23:09Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"0ae461855040d05e8c374d2994eaec418ff4e568ad908791e86f14c52c723bc8","abstract_canon_sha256":"5db8f8df0552568cfa750e9c62e9217417838152e718ad46d1ba7b61190f206d"},"schema_version":"1.0"},"canonical_sha256":"0c3d8d33214ffaddcf73706a0f998e24eae7a94dca2908a1f2f632b55472fec9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:43.890823Z","signature_b64":"zAp2MZXXSamFTbaVpKGYPbntYn4WLHXX6qn8rrMy45q/md2tP27hPD76dKcvkEeau1O5hY+6MOZX8d+IsWnvCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0c3d8d33214ffaddcf73706a0f998e24eae7a94dca2908a1f2f632b55472fec9","last_reissued_at":"2026-05-18T01:58:43.890152Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:43.890152Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1201.4519","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":"2026-05-18T01:58:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZpGgEgS13kASKrczezKtCVCG7prOaFE1xCv326qJtVUQYTXpmgF6GaVPOr4vepBQBvJcz04iVU64tDt9iRIiBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T20:36:55.629266Z"},"content_sha256":"c87192c0c81c3dd97a3a061e6c8909868a865689c05a7ad6909d476f52e5f5f0","schema_version":"1.0","event_id":"sha256:c87192c0c81c3dd97a3a061e6c8909868a865689c05a7ad6909d476f52e5f5f0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:BQ6Y2MZBJ75N3T3TOBVA7GMOET","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmic Rays at the highest energies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"Angela V. Olinto","submitted_at":"2012-01-21T23:23:09Z","abstract_excerpt":"After a century of observations, we still do not know the origin of cosmic rays. I will review the current state of cosmic ray observations at the highest energies, and their implications for proposed acceleration models and secondary astroparticle fluxes. Possible sources have narrowed down with the confirmation of a GZK-like spectral feature. The anisotropy observed by the Pierre Auger Observatory may signal the dawn of particle astronomy raising hopes for high energy neutrino observations. However, composition related measurements point to a different interpretation. A clear resolution of t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.4519","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":"2026-05-18T01:58:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JPFC6IxqDCC3IUMTGRNz1lo3Teo9ZwQ8VkcR8cOe0jdctMWHrGV8ZOJWX+xCEMUYlji9Y9FDKHzUeomfj0e3BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T20:36:55.629721Z"},"content_sha256":"8fc0352af6bd55750ac2f25660668e8ade518b72593966de4129d392eb2512ae","schema_version":"1.0","event_id":"sha256:8fc0352af6bd55750ac2f25660668e8ade518b72593966de4129d392eb2512ae"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BQ6Y2MZBJ75N3T3TOBVA7GMOET/bundle.json","state_url":"https://pith.science/pith/BQ6Y2MZBJ75N3T3TOBVA7GMOET/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BQ6Y2MZBJ75N3T3TOBVA7GMOET/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":"2026-06-05T20:36:55Z","links":{"resolver":"https://pith.science/pith/BQ6Y2MZBJ75N3T3TOBVA7GMOET","bundle":"https://pith.science/pith/BQ6Y2MZBJ75N3T3TOBVA7GMOET/bundle.json","state":"https://pith.science/pith/BQ6Y2MZBJ75N3T3TOBVA7GMOET/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BQ6Y2MZBJ75N3T3TOBVA7GMOET/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:BQ6Y2MZBJ75N3T3TOBVA7GMOET","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":"5db8f8df0552568cfa750e9c62e9217417838152e718ad46d1ba7b61190f206d","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-01-21T23:23:09Z","title_canon_sha256":"0ae461855040d05e8c374d2994eaec418ff4e568ad908791e86f14c52c723bc8"},"schema_version":"1.0","source":{"id":"1201.4519","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.4519","created_at":"2026-05-18T01:58:43Z"},{"alias_kind":"arxiv_version","alias_value":"1201.4519v2","created_at":"2026-05-18T01:58:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.4519","created_at":"2026-05-18T01:58:43Z"},{"alias_kind":"pith_short_12","alias_value":"BQ6Y2MZBJ75N","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"BQ6Y2MZBJ75N3T3T","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"BQ6Y2MZB","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:8fc0352af6bd55750ac2f25660668e8ade518b72593966de4129d392eb2512ae","target":"graph","created_at":"2026-05-18T01:58:43Z","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":"After a century of observations, we still do not know the origin of cosmic rays. I will review the current state of cosmic ray observations at the highest energies, and their implications for proposed acceleration models and secondary astroparticle fluxes. Possible sources have narrowed down with the confirmation of a GZK-like spectral feature. The anisotropy observed by the Pierre Auger Observatory may signal the dawn of particle astronomy raising hopes for high energy neutrino observations. However, composition related measurements point to a different interpretation. A clear resolution of t","authors_text":"Angela V. Olinto","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-01-21T23:23:09Z","title":"Cosmic Rays at the highest energies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.4519","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:c87192c0c81c3dd97a3a061e6c8909868a865689c05a7ad6909d476f52e5f5f0","target":"record","created_at":"2026-05-18T01:58:43Z","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":"5db8f8df0552568cfa750e9c62e9217417838152e718ad46d1ba7b61190f206d","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-01-21T23:23:09Z","title_canon_sha256":"0ae461855040d05e8c374d2994eaec418ff4e568ad908791e86f14c52c723bc8"},"schema_version":"1.0","source":{"id":"1201.4519","kind":"arxiv","version":2}},"canonical_sha256":"0c3d8d33214ffaddcf73706a0f998e24eae7a94dca2908a1f2f632b55472fec9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0c3d8d33214ffaddcf73706a0f998e24eae7a94dca2908a1f2f632b55472fec9","first_computed_at":"2026-05-18T01:58:43.890152Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:43.890152Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zAp2MZXXSamFTbaVpKGYPbntYn4WLHXX6qn8rrMy45q/md2tP27hPD76dKcvkEeau1O5hY+6MOZX8d+IsWnvCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:43.890823Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.4519","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c87192c0c81c3dd97a3a061e6c8909868a865689c05a7ad6909d476f52e5f5f0","sha256:8fc0352af6bd55750ac2f25660668e8ade518b72593966de4129d392eb2512ae"],"state_sha256":"f24cd5f1e12b3f79c4b04e44d99fc668b04269929a18c38527df35e8c68307c4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LQXxISteOhpVj6qTpj0HnvakkSNVqwqQn1FaUHP3SJsVZZHJh2SPNB0MlukvukgM4ySJgvcY3o/AKOYRHuUwCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T20:36:55.632310Z","bundle_sha256":"675596ab4d502a1268aecb69f4e89f6d56a8c9f58801ccb3a28dc9cd49538397"}}