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 0x76c595ea7ad389728a78c874ebecad66dd1ad595a101ffb051292c50cb849ce0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ffb6d8c-25db-4152-b145-a70cb3646864.json and https://artists.proofprofile.net/proofs/artist/1ffb6d8c-25db-4152-b145-a70cb3646864.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
TVドラマ・ピアノ・コレクション １６ 「和」
ラブ・ストーリーは突然に(「東京ラブストーリー」より)
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 0x576be225895926a1e262cac6daf19c14eb5329d88dc49f227a59ee303c134aeb. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPG100900420 — a six-check JSON result.
TVドラマ・ピアノ・コレクション １５ 「舞」
JPアニメ・ピアノ・コレクション''空''
スタジオジブリ作品集・ピアノ・コレクション''音''
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea90329e99547372905d7dab7e810031a5f14e022cdf042d15e3fdf711064b4. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/JPG101200812 — a six-check JSON result.
人生のメリーゴーランド（ハウルの動く城）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad89c4646d01e4eba09505f358dc56c1a5337f60074e7b718a9d938572c9757a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/JPG101200819 — a six-check JSON result.
韓流ドラマ・ピアノ・コレクション''雨''
J-バラード・ピアノ・コレクション 願い
スタジオジブリ作品集ピアノ・コレクション”楽”
Studio Ghibli Works Piano Collection Raku - EP
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1161f6cdd608ab9ca1928bfe6d9ebff618c3fd1315b945647c5e2e7cb5e394. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPG101301007 — a six-check JSON result.
逢いたい～ボゴシップダ (「天国の階段」より)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbeaa96b82b77f9e7bb39ba0ba251e96f7e7653b067f71d17231953ab491173e. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/JPG101301011 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d0ff68096bd82eaeda36dbf96e783ac251926705c90470162767302fbb26d3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/JPG101301014 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4c063bc73d957517c9a41e6c0e4f17aa72bb2bed71c0def0cf642a2b1ab0fb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPG101301020 — a six-check JSON result.
Korean Drama Piano Collection Toki - Single
韓流ドラマ・ピアノ・コレクション 時
スタジオジブリ作品集 ピアノコレクション 童
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63ef266a595bf494dc8f3692573d9c857801da348fd39d0f8b2cefa576ef2c1. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPG101312901 — a six-check JSON result.
いつでも誰かが（平成狸合戦ぽんぽこ）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3311d9845a1a206b911ad081ed69ed3e1fd70575609d71bcb6d84c3cf334c4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101312902 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1585b5135612eb28e020163b8a2b3164e5273fe4ca139d07ff5a3f3f94af9736. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPG101312904 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07f7d7cc1451d359415bb604c0aef8294ac3bad0d6a59e095ed27e09d7b490b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPG101312907 — a six-check JSON result.
悲しくてつらくても（韓国ドラマ「馬医」より）
J－バラッド・ピアノ・コレクション''歌''
Studioghibli Works Piano Collection Best 26: Music Children
『スタジオジブリ作品集・ピアノ・コレクションBEST２６ 音楽童』
Toki Wo Sakanobotte (The Moon That Embraces the Sun)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14723ab4503fff83c7c2e8cbba6d29d407408b81a45bddf71e31cfbf04dbe4e. 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/JPG101312506 — a six-check JSON result.
時をさかのぼって（「太陽を抱く月」より）
ワールド・アニメ・ピアノ・コレクション 雪
J-バラッド・ピアノ・コレクション 花
奇皇后メイン・テーマ（「奇皇后」より）
WORLD ANIME ピアノ・コレクション９ rerecorded versions
花束を君にpiano full version、真夏の通り雨inst version
PPAPペンパイナッポーアッポーペン（メロ入りカラオケ）
悲しくてやりきれない（「この世界の片隅に」より）inst version
アイネクライネ（orig. Kenshi Yonezu) inst version
打上花火（「打上花火、下から見るか？横から見るか？」より) (inst version)
打上花火（「打上花火、下から見るか？横から見るか？」より) inst version
いのちの名前 (「千と千尋の神隠し」より) - Single
まちがいさがし（「パーフェクトワールド」より） (inst version)