Mayuko Hitotsuyanagi, better known by her stage name Cuushe, is a Japanese singer-songwriter, multi-instrumentalist, and record producer from Kyoto. She is based in Tokyo. She is one half of the duo N
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fb7403d048fdda9ef94a9f5ab03f63a54f62541b8b4907bfe672cfa5cec7ad. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/702f8bbe-7c56-47b0-b4bc-924e26432314.json and https://artists.proofprofile.net/proofs/artist/702f8bbe-7c56-47b0-b4bc-924e26432314.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e4cdd933db5f08b92e93a0299052e459fee9f0bf29423b142e82319b071ca1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2143556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305f2ecb9f1913772b3c29675a1c5a98186bd027d2bc4bb9cfa5009f18fe775a. 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/QMFMF2005114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af588d007be9973f0dac30bfda0100d12d22bef9074c592938eb3f8477cfd49. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TW2143557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae93bc23e158e755b406f401aeead2c66c5bddde74445b3fec7176831747b263. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMFMF2005117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e37a5b0fa864d8b8464fc67e836f652441756d4193ee1fd266ebe08a0e1ece3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM7282093833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12fe5e75a935b990dcef57d881e2910ffdc44d802daccbd3df848a49b7cd997. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7282093831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631aa00c61b507c3d8317a3952aec5e585fe5f9e7d0db9d63c54403788e7e7bb. 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/JPB641300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4df2beee08e75f51fd8f6d5cd545650802ac8bf507b1db9985556e8282db761. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/JPB641300603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518924cdf98b6f2ffdd9a192467c33aba3caf5bf75aa2ecfda6073b457bb9c2f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/JPB641300605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afc41423ca03c35f3c420d3391c1433ca088536fd8a8ce7606d0798d3dd951a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/JPB641300606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa053fec0df42fc6b8acef8d64f0d66bfaf1ec058881887270d41a705cc060cbd. 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/JPB641300607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e43f9cb9ebd61d4f2d75c4ee380d5cf30c3cdea94a703af93a45f061c4f391. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB641300602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faf30eef2b3f865988b337c51a431382a713141e47ce38a8b01090f7220f1f0. 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/JPB641100351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5159c86635ca49ff7d0e54ca7e2bf03e04050a529a31a9a9f79468a82bb6add. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPB641100352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90b520233a5fad2318a313dc07eedbbd2c36dbb7e3b83a6150551d01557fdac. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB641100353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766aa637f0db68707db818a8f813175cceffee9535f73501845d4c662a96b37c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPB641100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8324779c1f475ad0add1e793d77159e1849e947f84acf3cb12ffff15dfb4a9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB641100357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5259053ef7462b7ec5f84928e243eb07c3480d3cea0855b0f239e9e7f29dc207. 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/JPB641100358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305f2ecb9f1913772b3c29675a1c5a98186bd027d2bc4bb9cfa5009f18fe775a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFMF2005114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a19d36f03b43e8999c2df44f196d092e2a186d7d870b2b66c7746ea4953e6ad. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2B1511565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8620e9f039107750e10df2ac087f03ccdaa095261880d79012ca0cd482330fd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2B1511567.