1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ef064176c2c8539df32745674d2de0a2e58087f02f736c416663ee67220f23. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88a76593-f3da-4640-b38b-45a60b94290e.json and https://artists.proofprofile.net/proofs/artist/88a76593-f3da-4640-b38b-45a60b94290e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
柳家さん喬1 「片棒」「芝浜」－「朝日名人会」ライヴシリーズ10
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3474378ca95c1b01810c5e09a3e89ecefe8a3c62a7b367489bd59d860dc70d4a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500131 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaaf0b982fe9dc740c9e58ccff9c40ed3f7045904b7ad26378f9ae872b6f2e95. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500132 — a six-check JSON result.
柳家さん喬2 「千両みかん」「ちりとてちん」－「朝日名人会」ライヴシリーズ27
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc6d1f7e7d4e80e696a8927354e630a22d8622145efe5bf99ac11ff9a677e07. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500134 — a six-check JSON result.
柳家さん喬3「唐茄子屋政談」－「朝日名人会」ライヴシリーズ33
柳家さん喬4「品川心中」上下－「朝日名人会」ライヴシリーズ39
柳家さん喬5「福禄寿」－「朝日名人会」ライヴシリーズ60
柳家さん喬6「おせつ徳三郎（通し）」－「朝日名人会」ライヴシリーズ63
柳家さん喬7「猫定」－「朝日名人会」ライヴシリーズ70
柳家さん喬8「船徳」「胆潰し」-「朝日名人会」ライヴシリーズ75
柳家さん喬9 「鴻池の犬」「水屋の富」-「朝日名人会」ライヴシリーズ76
柳家さん喬12「あくび指南」「鼠穴」-「朝日名人会」ライヴシリーズ88
柳家さん喬10「雪の瀬川（全）」-「朝日名人会」ライヴシリーズ85
柳家さん喬11「明烏」「棒鱈」-「朝日名人会」ライヴシリーズ86
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412e162ee6ee1c473dc50f87a4f7891e6d57d83abae7683d4a9378881ce49e96. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500306 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aeedf0055c179dbe81fc89f57ec37a198dc319266e9bc3d17bc56122d272325. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500307 — a six-check JSON result.
柳家さん喬13「柳田格之進」「井戸の茶碗・トーク1」「幾代餅・トーク2」-朝日名人会ライヴシリーズ91
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9faae915b2632024a8c8f22a07c20d88c299b9355b623e727bf6b02b066f122. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401600392 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ff48ff86b393ab8dde47bb2037917bc4d8cb2aa60ffdea7a220eaaa8f6c801. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401600394 — a six-check JSON result.
柳家さん喬14「子別れ」-「朝日名人会」ライヴシリーズ94
柳家さん喬15「夢の酒」「妾馬」-「朝日名人会」ライヴシリーズ101
柳家さん喬16 「笠碁」「寝床」- 「朝日名人会」ライヴシリーズ112
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5e22b9abd0b87018b5bfbbc66456eab75fae2b39d595a8a3e71798b3cf03e7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401600039 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8240bb9d341530c6f7107349c8fe350b05fad6d074ef9ef5a8cb722262cf6f. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401600040 — a six-check JSON result.
柳家さん喬17「浜野矩随」「三年目」「百川」「掛取万歳」-「朝日名人会」ライヴシリーズ120
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3777f84f3d114698af1be8db5d62581ff49b83818af5ad3e26b432fd3a594086. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401700142 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe12ac2a4760eaec2583b8fde6a695e4c25d5739856f910d77743b2eac80da4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401700143 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e860773c7d6519fa10c8f37819246fd361fb664f3ff7996f766175eaf89eb4. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401700145 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd34dd42f1b72e4c1664595343553cd065edb20aec3f87ab71131e9d773d7cb. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401800016 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6718429a98d0082e8d1388f22e51ad28f8682906b84d9441c095cdc6f4c548ff. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401800019 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e144d2276f2e818ce8761a6dc1355e64259f3ec38e0bdd185b866f6f8e92c8. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401800020 — a six-check JSON result.
柳家さん喬18「朝日名人会」ライヴシリーズ125「ちきり伊勢屋」（全）