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 0xc5fce181db2721aeaa851a34cc434813a9891ab2a770abbc17f9c50732356d5b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37e391c0-49e8-49d4-b4cb-08dbe1d9fb55.json and https://artists.proofprofile.net/proofs/artist/37e391c0-49e8-49d4-b4cb-08dbe1d9fb55.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xc5cd83fdc8dd36a48e8b092f51946174cd8994a3fbd2d5e8b89e71a80e9cdbdb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPE561401736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17143baa59d6467ec7c7a8c4ef46a2ca6e77629d69fe5bd08d2ac99dcb95dbeb. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPE561402129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa142635fd4ffc0676bb80d9e42faf348999e516671b713b6687df2fd30a1ab. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPE561600264.
ハイパーゴアムササビスティックディサピアリジーニャス
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8835cd6b3fd64910fa1e9611c462e001cf3d709321ccfc0950c7b6f9a35f82. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/JPE561600688.
ジャスティン⇒ジャイブ⇒ジャスティファイ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6ada0035b2d50b393eb94a9aa17df6aa9aedb3f023e518dca423e851950d9d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPE561302954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4b5a8a1f4b5e3bb875b5e37ef7f14e1c5e8b528ba3fff83a366b5808614c1d. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/JPE561302960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cd83fdc8dd36a48e8b092f51946174cd8994a3fbd2d5e8b89e71a80e9cdbdb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPE561401736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235018094245354e2c2f368a72386130108717c4a9c7c82c8cd8ab8f358f21b2. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JPE561600690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa142635fd4ffc0676bb80d9e42faf348999e516671b713b6687df2fd30a1ab. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPE561600264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8835cd6b3fd64910fa1e9611c462e001cf3d709321ccfc0950c7b6f9a35f82. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPE561600688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba10946efddc5947d50483341c3dd8b8c09f92f12d9bfb38a8da19f542f20f0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPE561905342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bdcd1a0397ed8055c189d3789b239150a5091d64eca10fcbd43506ed8d80d8. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPE562006808.
マッドハッターズ・マッドハート
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9ff8be4a88f8903166924073fd28a2cd020b7178d036a11eebfab497a1ee78. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92Q2200692.
ハイパーゴアムササビスティックディサピアリジーニャス (feat. KAITO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1d40ec5d14af87bc928c2ddcda9a736bf5da7e265fb6822368238864ee0462. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92Q2200693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77380a4b711756f6f9dda200f748a75e488c5a82d91b33955e23cd05a6b862d6. 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/JP92Q2200694.
フロイライン＝ビブリォチカ（KAITO&MEIKOバージョン） (feat. KAITO&MEIKO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414e33379a428bbece6ba796ea7d5ea129ac2b8df877a26af63890c4b41fa2d9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JP92Q2200702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832650f61edc6e0ae10f699a6489574120e444578fe3f0e8c26f5dd4076b47d6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JP92Q2200681.
ドクター=ファンクビート-初音ミク「マジカルミライ」10th Anniversary Live- (feat. KAITO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b3eb1a2946eb02a99ad88f37514c8bf8082314b91aba0a19007b86521c1ebe. 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/JP92Q2400670.
Kagaminext feat. 鏡音リン、鏡音レン ―10th ANNIVERSARY BEST―
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3915bb5bead3497918b96ee4b180208fd4c8b5a0ba2c02ad50c65375bbbe8709. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPC231700367.