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 0x5f994876a35fd86f57f64dbfe1c98de38a389e135a0b4e8a5bdeb1f2db6b3d60. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6907c8c4-315e-451a-a699-e1af0f87fc6d.json and https://artists.proofprofile.net/proofs/artist/6907c8c4-315e-451a-a699-e1af0f87fc6d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
これだけで伝わる！海外旅行カンタン英会話
すすめられたら／理解できないとき
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 0x0b35292a36332759225ee327e49449eaba55210551c8b7ba63ff8518a7c0f696. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPK1903175 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28283980aadd248c27065b82694002b7fd8bd222da773ce6f514ecbf06c15bdc. 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/TCJPK1903181 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fa13188b161044463c4083fe2a3f655cf3af0e64de553a7e43f70372caba14. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPK1907428 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697df2866fd515db919a2c9cc3c99e5147acd7adc5471fe1084c772754a4398f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCJPK1907430 — a six-check JSON result.
決して ～しないで / なんて～ なのでしょう!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6083afe0019c6bf5ad165e1a677e6759d62fd86c08afef8448381ed8ad8621. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPK1907431 — a six-check JSON result.
なんて ～なのでしょう! / はい、～ をどうぞv
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb449264cfe298926870e6a58ee7d08d8bf6cb9ac30097fe1b6a0a21b478437. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPK1907432 — a six-check JSON result.
～するつもりです / きっと～ だと思います
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e6d10028ff28a09eeeb46636ee46ad252badf6322c9cc8e887165bb56e7a44. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCJPK1907434 — a six-check JSON result.
～はよくわかりません / ～ に (～することに) 興味がありますか
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce0b0e55721ced5895cd2a2decaa72da851fe4c6131ee6ee589828a05351a91. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCJPK1907435 — a six-check JSON result.
～のように聞こえ (思われ) ます / ～ がありません
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ad0921604f0b8ab7e28f3b725f6b485be01c964fb4efdfce5640542415197c. 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/TCJPK1907440 — a six-check JSON result.
～してもいいですか / ～ しなければなりません
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aefc653f94a16ff54ba2954a8d867c61134ce77c4968f3b56e4deba2ab5099d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCJPK1907447 — a six-check JSON result.
とっさに役立つ 英会話ハンドブック
今、世界で必要とされている英会話を習得する
思ったことがすぐに話せる！即実践英会話術
世界一カンタン！最低限知っておきたい英会話の基本
知らない人は損をする！できる人の英語術
英語脳になる！聴くだけ簡単英文法①「ありがとう」から「好きです」まで
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513c441eac750286c323c9b0697808f2bd59f71a096330a5b67a729818d8d2ae. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPL2079761 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749d22ec53a4edfa5d5a67f00c9c6c366b97da9236aff61471c778c48de6a9eb. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPL2079763 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc0828ba160eee976978db48276b8f55577d0f9f582b9fb1ed412191e97a2f3. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPL2079765 — a six-check JSON result.
英語脳になる！聴くだけ簡単英文法②「～と思います」から「助けて」まで
YOUと仲良くなろう！覚えておきたい超カンタン「おもてなし」英会話
ナンパも「ツボ」をおさえたら簡単!! 恋愛英語脳 口説きテクニック編
聞き流すだけで！英語脳になる 偉人ポジティブ名言
英語耳が育つ！やる気を高める賢者のことば