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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dc4048e9b7d3b9887262eaaa2a4be01a1b7f97460d7388cce5f745dbbecc25. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d0989a4-f6a4-46bb-871b-4cdc0f125a96.json and https://artists.proofprofile.net/proofs/artist/6d0989a4-f6a4-46bb-871b-4cdc0f125a96.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ノスタルジア 信長貴富 無伴奏合唱作品集
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb562eae0c61f9df53b296263c5e6fd305df9661ac7f848ecd81ce249ffe8570. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPG201215624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b451c45be91d24f87d4a6fb4ac217525785ec0e5d6561fa2b4a71d979f9c14. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG201215631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0be9c2f9c168232fa9bf13a2a8064b2acb9cdb8847fe87191c00932df39e676. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG201215639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffe44e107f406e762346abe52ee3adf0fe02bd44bddeb179fa65cb069b8910e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPG201215645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06f74be12f2acfec25e9f0ac68326bf2664fb91fce2de9cdeb8df61173a3eca. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPG201215627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a008e4ee469a68ed34530528804b4f0f90ce5cc36edb4db5b7f6dbedeb8ac1. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG201215632.
池城淑子、伊藤美佐子、戸丸華江／山内知子
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04279faccd8bb282e304670341dc4efaeb65af2aa60f3e928cfb3c485289cf74. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPU971911052.
この地球のどこかで〈改訂版〉（アルト）
伊藤まり枝、今井典子、斉藤博子／吉田けい子
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6651a60694334aaa423ae3d412c51bd18217379ec74baffd6bd9c094176811c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPU971911066.
福永一博、本馬親良、宮西一弘／吉田けい子
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb386c259396962f9652bbdae64d048403ceb6f82979437fc653e6fc09f578879. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPU971911079.
この地球のどこかで〈改訂版〉（カラピアノ）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d82ba2404d942acb61bca08f434597f72b35b1522f4e090f5cf60c66cd9c98. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPU971911090.
市丸恵子、斉藤博子、西川直美／山内知子
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4eed5c6e0e66d35e0100d3a0d0c6bdc1f2aac652f23a3c9c553800fccbd100. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU971911058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca44441ffbec81d26246650362205e583f35aa2072f972823afad1f5c81879b2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPU971911093.
金山京介、福永一博、宮西一弘／吉田けい子
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb428c9a928e6bb0f0df11ef5175697dd399f599b8ad234c3c01a51112016064. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPU971911083.
あなたへ-旅立ちに寄せるメッセージ（アルト）
今井典子、岩田真奈、西川美幸／吉田けい子
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9197361a32937922b27303c2279b69e2890df163c700369cf43ba0edc6723ba. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU971909071.
小堀勇介、福永一博、宮西一弘／吉田けい子
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d621e38ce16c7c46dbad84dcdfa179516f84e42bda76b39e041ba2fa42a9bef. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPU971909084.
今井典子、岩田真奈、西川美幸／山内知子
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4285c946b88994c1b433bb1119117cabd391dee66d02308878ee499205397a9e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPU971909073.
ローレライ (New 東京混声合唱団愛唱曲集)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a91938fdb3a75d3a3583fa59f1e3c07d1b82cbba1c7a1d2b0522e8d25eab6ba. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG201215296.
THE CHORUS '07【混声/女声編】雨の言葉 教育芸術社発行歌集・曲集準拠CD
もろびとこぞりて 美しきクリスマス ナイト