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 0x073aa599985bad28e0b8d97545b7554e716bdb6cdb49d481e78937643b9e5013. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6280be99-214e-4d9a-84a3-6270db8dee04.json and https://artists.proofprofile.net/proofs/artist/6280be99-214e-4d9a-84a3-6270db8dee04.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
柳亭市馬1「猫忠」「将棋の殿様」-「朝日名人会」ライヴシリーズ62
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 0x6c589c289e9a18b3bcc8493d81321e6784062e50a6131909a8c70851f5c599f0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d13ba3d1c54e8a036e1c4ae78874449603ee5f59e9544b8e3b7fee28326cfc2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500258.
柳亭市馬3「宿屋の仇討」「鰻の幇間」-「朝日名人会」ライヴシリーズ82
柳亭市馬2「富久」「掛取万歳」-「朝日名人会」ライヴシリーズ77
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b088e1f4c4e8a798ea735f61aaef97766674c85c68a85e2efe47f66e5b327f4. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1574f9835e5521482e06cb709fb56f522b3031dfda7e7058542ff158c10f1fd8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4b215d128db63e27780d3cbcde3955f04020ead851439070a9db12ae7cebf7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb625ad0198740808124b2a975e099108beb85c00bac882466c7864fd0bdce9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500260.
柳亭市馬6「妾馬」「廿四孝」-「朝日名人会」ライヴシリーズ107
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77821cc5b3da576ef6ca6eb7507d28afd3cefaaee78ca6f44da96bae10f2daae. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23418cb1289d575eb6fcecbc4f83b1f38f7cf436d5347d10cbebb266576e9c1c. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500248.
柳亭市馬4「三十石」「らくだ」-「朝日名人会」ライヴシリーズ93
柳亭市馬5「馬の田楽」「猫の災難」-「朝日名人会」ライヴシリーズ102
柳亭市馬7「朝日名人会」ライヴシリーズ122「高砂や」「御神酒徳利」「盃の殿様」「不動坊火焔」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b68ce4ebb2558855eaddb9a3b8830f65b1a2084e81c252178bcfada696e534. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401700291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3174aadc4e2fdb5c01933fbac90b4b8daf4384eb2a449331dd2641e412abaf75. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401700292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f0dc5046e8efca689cc204786a8718e77642d9130f861758dd0a491af28132. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401700293.
柳亭市馬8「朝日名人会」ライヴシリーズ130「文七元結」「淀五郎」