{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:3RGXGUCXVW2A24C34LFXT3YWXK","short_pith_number":"pith:3RGXGUCX","canonical_record":{"source":{"id":"2111.03635","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-11-05T17:35:58Z","cross_cats_sorted":[],"title_canon_sha256":"ca6faa710811f06128b6fa1005c5a236b85fd5a3666aabbd37054de221518769","abstract_canon_sha256":"0a9932be7f4456597af37e3009d056793310948e8fe7627c829660f406ec6ff3"},"schema_version":"1.0"},"canonical_sha256":"dc4d735057adb40d705be2cb79ef16ba9378dc067e7be783f2f8edf9efbe2edb","source":{"kind":"arxiv","id":"2111.03635","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.03635","created_at":"2026-07-05T03:29:26Z"},{"alias_kind":"arxiv_version","alias_value":"2111.03635v1","created_at":"2026-07-05T03:29:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.03635","created_at":"2026-07-05T03:29:26Z"},{"alias_kind":"pith_short_12","alias_value":"3RGXGUCXVW2A","created_at":"2026-07-05T03:29:26Z"},{"alias_kind":"pith_short_16","alias_value":"3RGXGUCXVW2A24C3","created_at":"2026-07-05T03:29:26Z"},{"alias_kind":"pith_short_8","alias_value":"3RGXGUCX","created_at":"2026-07-05T03:29:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:3RGXGUCXVW2A24C34LFXT3YWXK","target":"record","payload":{"canonical_record":{"source":{"id":"2111.03635","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-11-05T17:35:58Z","cross_cats_sorted":[],"title_canon_sha256":"ca6faa710811f06128b6fa1005c5a236b85fd5a3666aabbd37054de221518769","abstract_canon_sha256":"0a9932be7f4456597af37e3009d056793310948e8fe7627c829660f406ec6ff3"},"schema_version":"1.0"},"canonical_sha256":"dc4d735057adb40d705be2cb79ef16ba9378dc067e7be783f2f8edf9efbe2edb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:29:26.654204Z","signature_b64":"GHP4ka5w/TANwwSC01X7pYuMfWI5HaZfNkvbvRvj1tlCpAsU3wzJZdESUTWrJyj/8zfa6mr56Jqf4WFXrg+KCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dc4d735057adb40d705be2cb79ef16ba9378dc067e7be783f2f8edf9efbe2edb","last_reissued_at":"2026-07-05T03:29:26.653741Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:29:26.653741Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2111.03635","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":"2026-07-05T03:29:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"StEsi/wIGGIAHzZoWDC8knaHx5JvCbkBUILm5MZPPwsWzUAx5fraFJJFY3gnawGfLdF5Elc41cH4zM7Q0QFqBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T01:25:30.519922Z"},"content_sha256":"8aaa85a69a58f2a47d77337bd0b193a78bb0576aa75241f7ed0f9bf168cadc4b","schema_version":"1.0","event_id":"sha256:8aaa85a69a58f2a47d77337bd0b193a78bb0576aa75241f7ed0f9bf168cadc4b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:3RGXGUCXVW2A24C34LFXT3YWXK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"BBC-Oxford British Sign Language Dataset","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Andrew McParland, Andrew Zisserman, Bencie Woll, G\\\"ul Varol, Hannah Bull, Himel Chowdhury, Liliane Momeni, Neil Fox, Rob Cooper, Samuel Albanie, Triantafyllos Afouras","submitted_at":"2021-11-05T17:35:58Z","abstract_excerpt":"In this work, we introduce the BBC-Oxford British Sign Language (BOBSL) dataset, a large-scale video collection of British Sign Language (BSL). BOBSL is an extended and publicly released dataset based on the BSL-1K dataset introduced in previous work. We describe the motivation for the dataset, together with statistics and available annotations. We conduct experiments to provide baselines for the tasks of sign recognition, sign language alignment, and sign language translation. Finally, we describe several strengths and limitations of the data from the perspectives of machine learning and ling"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.03635","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/2111.03635/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":"2026-07-05T03:29:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A+hDga0gusFwaBIv7Y7uf/ycv4vkN2gP0bVQ0tiIRMU3QJJAcPCtoPoqDytQwRM8Zyt3D2+mArrFJnnpMlcDBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T01:25:30.520578Z"},"content_sha256":"42968192c89f895b0c47a1c4f7c85acdf103549e7c726947aa13d7eb64c48b4d","schema_version":"1.0","event_id":"sha256:42968192c89f895b0c47a1c4f7c85acdf103549e7c726947aa13d7eb64c48b4d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3RGXGUCXVW2A24C34LFXT3YWXK/bundle.json","state_url":"https://pith.science/pith/3RGXGUCXVW2A24C34LFXT3YWXK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3RGXGUCXVW2A24C34LFXT3YWXK/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":"2026-08-06T01:25:30Z","links":{"resolver":"https://pith.science/pith/3RGXGUCXVW2A24C34LFXT3YWXK","bundle":"https://pith.science/pith/3RGXGUCXVW2A24C34LFXT3YWXK/bundle.json","state":"https://pith.science/pith/3RGXGUCXVW2A24C34LFXT3YWXK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3RGXGUCXVW2A24C34LFXT3YWXK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:3RGXGUCXVW2A24C34LFXT3YWXK","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":"0a9932be7f4456597af37e3009d056793310948e8fe7627c829660f406ec6ff3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-11-05T17:35:58Z","title_canon_sha256":"ca6faa710811f06128b6fa1005c5a236b85fd5a3666aabbd37054de221518769"},"schema_version":"1.0","source":{"id":"2111.03635","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.03635","created_at":"2026-07-05T03:29:26Z"},{"alias_kind":"arxiv_version","alias_value":"2111.03635v1","created_at":"2026-07-05T03:29:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.03635","created_at":"2026-07-05T03:29:26Z"},{"alias_kind":"pith_short_12","alias_value":"3RGXGUCXVW2A","created_at":"2026-07-05T03:29:26Z"},{"alias_kind":"pith_short_16","alias_value":"3RGXGUCXVW2A24C3","created_at":"2026-07-05T03:29:26Z"},{"alias_kind":"pith_short_8","alias_value":"3RGXGUCX","created_at":"2026-07-05T03:29:26Z"}],"graph_snapshots":[{"event_id":"sha256:42968192c89f895b0c47a1c4f7c85acdf103549e7c726947aa13d7eb64c48b4d","target":"graph","created_at":"2026-07-05T03:29:26Z","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/2111.03635/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this work, we introduce the BBC-Oxford British Sign Language (BOBSL) dataset, a large-scale video collection of British Sign Language (BSL). BOBSL is an extended and publicly released dataset based on the BSL-1K dataset introduced in previous work. We describe the motivation for the dataset, together with statistics and available annotations. We conduct experiments to provide baselines for the tasks of sign recognition, sign language alignment, and sign language translation. Finally, we describe several strengths and limitations of the data from the perspectives of machine learning and ling","authors_text":"Andrew McParland, Andrew Zisserman, Bencie Woll, G\\\"ul Varol, Hannah Bull, Himel Chowdhury, Liliane Momeni, Neil Fox, Rob Cooper, Samuel Albanie, Triantafyllos Afouras","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-11-05T17:35:58Z","title":"BBC-Oxford British Sign Language Dataset"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.03635","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":"sha256:8aaa85a69a58f2a47d77337bd0b193a78bb0576aa75241f7ed0f9bf168cadc4b","target":"record","created_at":"2026-07-05T03:29:26Z","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":"0a9932be7f4456597af37e3009d056793310948e8fe7627c829660f406ec6ff3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-11-05T17:35:58Z","title_canon_sha256":"ca6faa710811f06128b6fa1005c5a236b85fd5a3666aabbd37054de221518769"},"schema_version":"1.0","source":{"id":"2111.03635","kind":"arxiv","version":1}},"canonical_sha256":"dc4d735057adb40d705be2cb79ef16ba9378dc067e7be783f2f8edf9efbe2edb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dc4d735057adb40d705be2cb79ef16ba9378dc067e7be783f2f8edf9efbe2edb","first_computed_at":"2026-07-05T03:29:26.653741Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:29:26.653741Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GHP4ka5w/TANwwSC01X7pYuMfWI5HaZfNkvbvRvj1tlCpAsU3wzJZdESUTWrJyj/8zfa6mr56Jqf4WFXrg+KCA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:29:26.654204Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.03635","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8aaa85a69a58f2a47d77337bd0b193a78bb0576aa75241f7ed0f9bf168cadc4b","sha256:42968192c89f895b0c47a1c4f7c85acdf103549e7c726947aa13d7eb64c48b4d"],"state_sha256":"c45e344ebe11e2e9eb0e755edee9bfc159939a024c7bab641a474220dfdbd4d0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N19PNaGJ0s/ouhAnVx4odkQ8yrOcD6jOggn61z/Aw7dU5nfjv00KsCmZh+PN/zW8eAP4s3Rrmt/QShXZhKvnCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T01:25:30.526143Z","bundle_sha256":"72040c0140003d9c1826994ba9daa877365016d37c3056fb5e1b7b56225e49c1"}}