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 0x015d9974d458555264198bfb29beb61d0b79686b284e101bef11790b461fa79f. Chain 2 (Bitcoin): anchored in block 953970 (2026-06-16T16:09:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a058cb4-3590-4ad5-b883-2747b140dac4.json and https://artists.proofprofile.net/proofs/artist/2a058cb4-3590-4ad5-b883-2747b140dac4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
スーパーマーケット☆フィーバー feat.音街ウナ・初音ミク
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 0xba07ccc61ed6cb151e5a87d5873645e9c956ade1d5934bcc71bf129fddcec286. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/JPC232200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb8ef493472549da58b1a3f466057d29555bb8d9ae117d9b1879a862eabe098. 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/JPC232200024.
ポジティブ☆ダンスタイム feat.音街ウナ・鏡音リン
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2832a459c908549abd5fc0a92fba812e66ef980d4f99545c1a1e502679c04956. 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/JPC232200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623ebe239cc5533693934acb753e9dd428875ef92514ad301d8f086a35d8be19. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPC232200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2219d73ed81057a1d371369a0c81dccd0ab812b0fb5683afcf76cbea635f6aa5. 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/JPC232200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ee915f6054aeea09be07a886aa33d85e9c801decbe4987f0b3263fde6c6fed. 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/JPC232200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b4438afa1e8a0981bd7754d945fe27feb00a8d0e54b0505337289e1f75ee06. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPC232200046.
フライデーナイトフィーバー feat.音街ウナ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c5b0369f8ed9a10b232ab15a46ddc65e0a6c7c9f6732483112a44ff79cdf85. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/JPC232200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd46c9af628f75c680697629b42b761364ffe6cc5ce0f8116910f811f3340d5d. 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/JPC232200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b7220665fc4263f48250fa0798793562ab933980caab674454764dc38df0b2. 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/JPC232200028.
シニガミちゃんは偏食家 feat.音街ウナ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f92e19e5109dfe597e255c538f1e0027a43322c3a71821c3349859e68f059e0. 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/JPC232200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6e306aab263c5a35463bcf384badc3264d625beadd67d90ceac3493ef77379. 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/JPC232200029.
オルソドクシア feat.音街ウナ、鏡音レン
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0259666b47ee6fc31f4c396d92fe22f54abb65d856dd84b7c0359d864c30ee. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPC232200049.
インターネッツ・ディスコ feat.初音ミク＆音街ウナ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcd0145c63d826f035e6a8282bbb77e45b312c0e36afab1ed7ca915ad08e22c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/JPC232200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b982d32d3080882c6881ba155bbf9d8d13c63d022f981e8e3923bb575b8da29. 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/JPC232200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7cf2fd7f51c41f5baf6aaacb8e0085a68f055b2f415d104ed8f935de9d9e92. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPC232200031.
どんびーだんっ！ feat.初音ミク&音街ウナ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06301493ad4f7c036ecceae7433ce097f3b8127768985cf139a216bc0a3d5def. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPC232200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202ec813fa7e22f413ebc9b8aea6f0ce055bb24e42c28c9cb696a209a3a6057c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPC232200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e83ec1201f254f0e451159cda76fe6cf500a357d92806c9f64fbb383ace686. 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/JPC232200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ece726249ebc848cebe5a596d009a6590face7898e43668351dcae62bbd85fb. 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/JPC232200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345ebbda314a16bb19211e71cf953c95a7e0b96668a724beb9a80e5ec5ce120c. 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/JPC232200034.
ぼくらはきょうもあたらしい!! feat.音街ウナ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aec8214ae1815b57813d5ab3828ba2c52166cda6705e268b74944754cc5c491. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPC232200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4303d4aef713d204263c25354a2f79768121a87c4ca46787a8b3d5e0a7e60995. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/JPC232200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45da5e4815c008dd8233a438beded53ff41504713c18b1207d8d457f85b0f6f6. 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/JPC232200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9560d1e991865af37163e8d4bda054851f59da8bdfab1a4a3c2a9c940f6276c. 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/JPC232200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a4ed12392c1e35f753d8c1ccafb8063dd24c968b7678227abada21bcdc0d60. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPC232200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3313299c7073e2a3444640daccbf7319e242a183274d9091974aad944cffadbd. 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/JPC232200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852f404193d0175272e1995fa385caec1dc5b3bbde05848dfb5fb05553c55ba9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPC232200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf18656e23d74d1a61521e05c65fa16dfe0bb49ccc4fb75d94215f3a66e248ba. 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/JPC232200038.
ノーステップノーライフ feat.音街ウナ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa7280b0b9a93e974345f1ec5f93cb70626441a6c7b634d6012a6f67fd85447. 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/JPC232200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a114e87881a7ade6d29f44b0cd77ca7ea22500c73311fa2db4e9f832bbef7b3. 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/JPC232200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dd7fcab2e9b33ef2fd120f6ee0165409880b69a12f49227d8af338b42f19d9. 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/JPC232200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcade5bd1bafd1484f093f8b2b104a05ca60a3bdf2de78778f5af285a32857830. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPC232200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe850c676de742b21a01708dc3a748d910117a61c3287bd189e4db70c2c7b64d. 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/JPC232200041.
メンヘラじゃないもん！ feat.藤田咲＆田中あいみ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c690880477d45badd261373d885f54e0a392835ea2f05f79f8a3bf64ccb6d74. 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/JPC232200061.
スーパーマーケット☆フィーバー feat.田中あいみ・藤田咲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03b3a296477d47eb7cd23f23ad80a2b027ec01ec8e94e37caa1144fe1d2720c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/JPC232200042.