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 0xae31f60beb3ca21fc7ee4a14663196cc4306c19c541ef46c8f72069b7e659274. 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/441a0c5a-16e9-4d7e-81fb-08f16cfbed18.json and https://artists.proofprofile.net/proofs/artist/441a0c5a-16e9-4d7e-81fb-08f16cfbed18.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x30d33d6cb3fff6106d6edb422d8cc477b4f8bebdc28beaabb3cb174edf607852. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPW562001622 — a six-check JSON result.
しゅわスパ大作戦☆ [FN2 Remix] (feat. Nana Takahashi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdf48cf7655ae307c5ba13e16e414dfdbae5d7d301697c28132134e77c7ee8f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPW562001625 — a six-check JSON result.
THE EVENING STAR [DJ Command Remix] (feat. YURiCa/花たん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ef908ba2642c48d616791e1f93c9589201c090bf6c6174eb4adf94df3162d4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562001626 — a six-check JSON result.
Rainy, rainy days [FN2 Remix] (feat. 3L)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73f1e5062813e820923b25b5af8292dcba02a0e72ffcd576658b8c1ae86d253. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562001627 — a six-check JSON result.
全人類ノ非想天則 [DJ Command Remix] (feat. 匠眞/Nana Takahashi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31b515c9623c55e8fe0c9a5e512132b74174d152387525ca3d3bd146cbd7c18. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPW562001628 — a six-check JSON result.
RAINBOW IN THE DARK (feat. Nana Takahashi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbc18271c191f667168bc5e64ce9b73a9d7c79a6ffdc5b548c6f2977e69ced4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562001636 — a six-check JSON result.
方舟 -ARK- [MasKaleido Remix] (feat. YURiCa/花たん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8bb69e402465c1a9cf6a0ef7f61c727f3bb518f8f6103aa2f08b46887836ab. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPW562001638 — a six-check JSON result.
絡繰りドール [DJ Command Remix] (feat. Nana Takahashi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cebbc78d36371fb30348538af8b062e38a1b9c33caeb610878ff85a013b85ff. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562001642 — a six-check JSON result.
BAD DESIRED [FN2 Remix] (feat. Nana Takahashi/CALEN/西宮れん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b2ee331522dea9bb2466dc60d24ee7949f1d0d62c20db573b85e1f1b649b43. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/JPW562001645 — a six-check JSON result.
鋼鉄の魔女 -Iron Magus- [DJ Command Remix] (feat. YURiCa/花たん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ba87f834bbe7cdc61f89fe5781855f431c5c27ecf5d01e54139058752e8281. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562001647 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b6e0a36394db753ce1b4eacf0debd5fa504468cd87f068d412c21afeb9221c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562001650 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cae82a2d88cf5a5650ac6e15f139ce6691a4ff15eaec437d6965d2bcb5b265e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/JPW562001654 — a six-check JSON result.
Quod Erat Demonstrandum [FN2 Remix] (feat. Nana Takahashi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21602ab61c2192f7fb5725213fa80eb1b87742cf92bb4f2364313296bd075603. 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/JPW562001658 — a six-check JSON result.
AMNESIA [DJ Command Remix] (feat. YURiCa/花たん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573478245557122898b8809ff6e060287739cfa6b19d3d79284b802f271e2179. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562001659 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851242517a7b499e6f737eaeafbfcc14c008c3b7bcd41732cdb6392469ed91d0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPW562001662 — a six-check JSON result.
Grip & Break down !! [DJ Command Remix] (feat. Nana Takahashi) (Original Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae86f6300db3a7dc930e55e21f12d6236e02eb1b47561a0c92ececbba1c5df92. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562102279 — a six-check JSON result.
Get the star for you [DJ Command Remix] (feat. 709sec.) (Original Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8230e10187b25486a89d489bb7e92627b658ca83b749d7bea20ab5dad4809c86. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562102280 — a six-check JSON result.
しゅわスパ大作戦☆ [FN2 Remix] (feat. Nana Takahashi) (Original Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a911feaf508f7ca9d0f9e1a4f8dfaf61bbab0ec62e8f5f8ab4ca225ee893aa. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562102281 — a six-check JSON result.
THE EVENING STAR [DJ Command Remix] (feat. YURiCa/花たん) (Original Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1359e7208949764dc282721c4e9f09d21ac46bb60d0bd997005a7c3b186030. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/JPW562102282 — a six-check JSON result.
DREAMIN' TURBO [DJ Command Remix] (feat. Nana Takahashi/709sec.) (Original Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b39dd8d082504418b2dcef962b80eb55562885fe0a04429c48ab1baa1131274. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPW562102290 — a six-check JSON result.
NEED FOR DESIRE (feat. Nana Takahashi/DJ Command(Eurobeat Union))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4caad11b4868162f980c1e1a6fa0355d4a6b9978028b8a9b832de654be095be. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPW562107712 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa53a2ecfefd18a1d0c3eae799f63b5ef40585883b7e14f1edce40b8140ff4c. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562107713 — a six-check JSON result.
SPIRAL FLECTION [MasKaleido Remix] (feat. YURiCa/花たん/709sec.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb194546bcbaaf666488e402cf8b8aa7b4fbca913de32cf85074f40d720eeecd. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPW562107715 — a six-check JSON result.
Cosmic Magic Shooter [DJ Command Remix] (feat. Nana Takahashi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b600758576164557e65195a5b23301e02e0b2e3bfc3c24fbcb326c03b4fd43. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562107716 — a six-check JSON result.