{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:TWWVS2ZFLB2BJXGWTI5C2MSXK4","short_pith_number":"pith:TWWVS2ZF","canonical_record":{"source":{"id":"1907.10727","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2019-07-24T21:21:00Z","cross_cats_sorted":["hep-ph","physics.atom-ph"],"title_canon_sha256":"d9cef4eab7341b17146a0a8220c94c4362586a002e4f7f77016c5a4cf65caea4","abstract_canon_sha256":"b0349b68291c3e3126ca5878c66ec7a0f7efe76453563652fa827c82d9979c27"},"schema_version":"1.0"},"canonical_sha256":"9dad596b25587414dcd69a3a2d32575701b9cce7adac08c5e0dfdc58f7480b95","source":{"kind":"arxiv","id":"1907.10727","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.10727","created_at":"2026-05-17T23:39:34Z"},{"alias_kind":"arxiv_version","alias_value":"1907.10727v1","created_at":"2026-05-17T23:39:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.10727","created_at":"2026-05-17T23:39:34Z"},{"alias_kind":"pith_short_12","alias_value":"TWWVS2ZFLB2B","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"TWWVS2ZFLB2BJXGW","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"TWWVS2ZF","created_at":"2026-05-18T12:33:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:TWWVS2ZFLB2BJXGWTI5C2MSXK4","target":"record","payload":{"canonical_record":{"source":{"id":"1907.10727","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2019-07-24T21:21:00Z","cross_cats_sorted":["hep-ph","physics.atom-ph"],"title_canon_sha256":"d9cef4eab7341b17146a0a8220c94c4362586a002e4f7f77016c5a4cf65caea4","abstract_canon_sha256":"b0349b68291c3e3126ca5878c66ec7a0f7efe76453563652fa827c82d9979c27"},"schema_version":"1.0"},"canonical_sha256":"9dad596b25587414dcd69a3a2d32575701b9cce7adac08c5e0dfdc58f7480b95","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:39:34.667388Z","signature_b64":"QUPYTIwP5YWo9qb8uGTZQCJGsg0TdTQtIKX8s8de57NCiKXYYSwMxTr3i+/mvjqVjvHn0v571tlQw0aiqCmODA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9dad596b25587414dcd69a3a2d32575701b9cce7adac08c5e0dfdc58f7480b95","last_reissued_at":"2026-05-17T23:39:34.666720Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:39:34.666720Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.10727","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":"2026-05-17T23:39:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bAWNpi2unw3tArvFlbYsRtIbKBreEwzZMddaYb2wSKdmOJcERWp3IDnheZ/CdqkEep1ACFzSToc5ypvbaC/1Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T00:38:12.242101Z"},"content_sha256":"3d51312029ea3fec6101b22d82760b84ddfa8007e429e7a127508ce5be698b51","schema_version":"1.0","event_id":"sha256:3d51312029ea3fec6101b22d82760b84ddfa8007e429e7a127508ce5be698b51"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:TWWVS2ZFLB2BJXGWTI5C2MSXK4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Status and Prospects for CPT Tests with the ALPHA Experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph","physics.atom-ph"],"primary_cat":"hep-ex","authors_text":"T. Friesen (for the ALPHA Collaboration)","submitted_at":"2019-07-24T21:21:00Z","abstract_excerpt":"A primary goal of the ALPHA experiment at CERN is to perform precise tests of CPT symmetry. Here, we report on the significant progress made in recent years on antihydrogen spectroscopy and the outlook for the future."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.10727","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":"2026-05-17T23:39:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pFw62GJ9+EwhIGlwMlzgpc3LrMYCyRuX2Z/mz/P21TITbuwkQyx1OtLIJziQyLmPMwWmLGW0PbPIqbwJeVWCAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T00:38:12.242860Z"},"content_sha256":"19b57dcd8d53362668a6fa330c1199bd4db584a0973b8de055d9aa6e74ac824c","schema_version":"1.0","event_id":"sha256:19b57dcd8d53362668a6fa330c1199bd4db584a0973b8de055d9aa6e74ac824c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TWWVS2ZFLB2BJXGWTI5C2MSXK4/bundle.json","state_url":"https://pith.science/pith/TWWVS2ZFLB2BJXGWTI5C2MSXK4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TWWVS2ZFLB2BJXGWTI5C2MSXK4/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":"2026-05-26T00:38:12Z","links":{"resolver":"https://pith.science/pith/TWWVS2ZFLB2BJXGWTI5C2MSXK4","bundle":"https://pith.science/pith/TWWVS2ZFLB2BJXGWTI5C2MSXK4/bundle.json","state":"https://pith.science/pith/TWWVS2ZFLB2BJXGWTI5C2MSXK4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TWWVS2ZFLB2BJXGWTI5C2MSXK4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:TWWVS2ZFLB2BJXGWTI5C2MSXK4","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":"b0349b68291c3e3126ca5878c66ec7a0f7efe76453563652fa827c82d9979c27","cross_cats_sorted":["hep-ph","physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2019-07-24T21:21:00Z","title_canon_sha256":"d9cef4eab7341b17146a0a8220c94c4362586a002e4f7f77016c5a4cf65caea4"},"schema_version":"1.0","source":{"id":"1907.10727","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.10727","created_at":"2026-05-17T23:39:34Z"},{"alias_kind":"arxiv_version","alias_value":"1907.10727v1","created_at":"2026-05-17T23:39:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.10727","created_at":"2026-05-17T23:39:34Z"},{"alias_kind":"pith_short_12","alias_value":"TWWVS2ZFLB2B","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"TWWVS2ZFLB2BJXGW","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"TWWVS2ZF","created_at":"2026-05-18T12:33:30Z"}],"graph_snapshots":[{"event_id":"sha256:19b57dcd8d53362668a6fa330c1199bd4db584a0973b8de055d9aa6e74ac824c","target":"graph","created_at":"2026-05-17T23:39:34Z","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":"A primary goal of the ALPHA experiment at CERN is to perform precise tests of CPT symmetry. Here, we report on the significant progress made in recent years on antihydrogen spectroscopy and the outlook for the future.","authors_text":"T. Friesen (for the ALPHA Collaboration)","cross_cats":["hep-ph","physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2019-07-24T21:21:00Z","title":"Status and Prospects for CPT Tests with the ALPHA Experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.10727","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":"sha256:3d51312029ea3fec6101b22d82760b84ddfa8007e429e7a127508ce5be698b51","target":"record","created_at":"2026-05-17T23:39:34Z","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":"b0349b68291c3e3126ca5878c66ec7a0f7efe76453563652fa827c82d9979c27","cross_cats_sorted":["hep-ph","physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2019-07-24T21:21:00Z","title_canon_sha256":"d9cef4eab7341b17146a0a8220c94c4362586a002e4f7f77016c5a4cf65caea4"},"schema_version":"1.0","source":{"id":"1907.10727","kind":"arxiv","version":1}},"canonical_sha256":"9dad596b25587414dcd69a3a2d32575701b9cce7adac08c5e0dfdc58f7480b95","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9dad596b25587414dcd69a3a2d32575701b9cce7adac08c5e0dfdc58f7480b95","first_computed_at":"2026-05-17T23:39:34.666720Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:39:34.666720Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QUPYTIwP5YWo9qb8uGTZQCJGsg0TdTQtIKX8s8de57NCiKXYYSwMxTr3i+/mvjqVjvHn0v571tlQw0aiqCmODA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:39:34.667388Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.10727","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3d51312029ea3fec6101b22d82760b84ddfa8007e429e7a127508ce5be698b51","sha256:19b57dcd8d53362668a6fa330c1199bd4db584a0973b8de055d9aa6e74ac824c"],"state_sha256":"83b3488a8f2b32b4809e2ffad8da539e93a5f0935464864e3489c9c34aec6c55"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eOiM/e1ZG3NwzPAxs4ye/nCR0Xc+WBlyKS/UntyfwoqClA0Z1AfRBDDE+REDuOsdUXDyAkFFsnjkPJJI6zYPBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T00:38:12.248069Z","bundle_sha256":"e09f386eb50226e7d7e8e20601dc1cf0a1c2347bd2124f5e0c35b4b269e6c9bb"}}