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 0x69a928299d5ad76e2804653382d7febec8e091c4ac94e776150ad8d35ed21aae. 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/fb6ec3a7-ca88-4354-b400-bf97d0037302.json and https://artists.proofprofile.net/proofs/artist/fb6ec3a7-ca88-4354-b400-bf97d0037302.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 0x60534ab5e594034d74ce773f45ce6c5db920edabe0f7801f8b81dce0e5b4ec36. 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/JPW562003176.
BANG THE FIRE GONG !! (feat. Nana Takahashi/ARM(IOSYS))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60b92cab7f2032a64a3e9578fed38fcf9cd98be776b99ec0b7214c90d34ee32. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/JPW562003182.
Euphoria (feat. Nana Takahashi/隣人(ZYTOKINE))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa685987e0435f8e8cbc65f0ad31d59951322531f093367048378dbedaffde08c. 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/JPW562003185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73fb91e5d568cb39ec517e8be1c8865b77a64bd6fc4a56e4cc7310534fc394c. 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/TCJPL2071581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2211289a7df3a5b8cbffdaf728e57198a0b8d211df3381d96d17f9b963af02f6. 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/TCJPN2193412.
Shattered Emotion feat. Nana Takahashi - CYTOKINE Remix (2021 Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f526710eaad3bafacfefa84ef85a4a7f15225a5833c3092e591a1806c61aa7f. 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/JPW562107116.
宵闇の 影を切り取る 言の葉の feat. Nana Takahashi - REDALiCE Remix [2019 Remastered]
JUBILEE -THE BEST of ZYTOKINE/CYTOKINE4-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3beb68f469e058adf28ceab94e31ec6d62e501eb3d2116e440ef19282b2e62d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPW562003202.
PRESERVED VAMPIRE (feat. Nana Takahashi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140772500835505ca6dc079bdb7aacee5bfb974b6d9ff32cc569676a4106bab6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW561808314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa99c52f11760d39b844d4e086cab68b94b7175c07ce72abd038cd3804cb991b. 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/JPW561808317.
遙か三千大千世界 (feat. Nana Takahashi/VALLEYSTONE(Bad Fennec Records))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47ddb4bc6e3160bc6c19d62f17b8a3c4db3ba9b93f5f7ccd5bbfb3087fda6a3. 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/JPW561808319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a002ec372f413fb30b052f47703ac2f601ab59b2092ba27895508afb5a09536. 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/JPW561808321.
GUERRILLA GAME (feat. Nana Takahashi/DJ Command(Eurobeat Union))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd29d663af54f7e553dc62f3f34a3d4dabacd9a5436ab9f87ed447077dfa6b18. 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/JPW561808323.
NECRO MEISTER (feat. Nana Takahashi/709sec.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1f492325417ace8a8cc10d07fd6beb997bf7b5390e4d5f7113b198681a504a. 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/JPW561808170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1263dc1ffd0de9370a751a8ad91ad6535a2ef69195a4503322660715d26f33ca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW561808175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c4aa0634333259f8c1ecbb81fa6f18a0817647ad719e560e67dffcd3b90a8a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/JPW561808177.
死蝶 -Swallowtail- (feat. Nana Takahashi/709sec.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde261cbee30c3bac0a1df88326753c5cea1681407dbbd3bd08b99cb888dc51e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW561808179.
Earthquake Super Shock (feat. Nana Takahashi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c4321c67531a06f0afe7060efabe7dc5bb93f1cb66f25652e36089c177ddee. 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/JPW561808074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99192f272ef1d666aea1ae1cca536f7d2fd64375eb5c8e3b372077315c330216. 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/JPW561808080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd122e34a84162244599826264d752918cb63e5d36f5c6d29054ae1daaa5f30c7. 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/JPW561808081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151f0b6016ec044558875486bc5bf3bc3a097615bde7538c1cb8bd616b0e2bde. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPW561808084.