Kasane Teto (, ) is a virtual singer with a voicebank for UTAU, a singing voice synthesizer software. The character was initially created as a joke for April Fools' Day 2008 on the Japanese textboard
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 0x2933cf11cf24454a058039bfbfe0f977f75bdd940873e4df02c097c3197127ef. 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/a7e03861-4c5c-4fe9-a76b-89d8b33198f0.json and https://artists.proofprofile.net/proofs/artist/a7e03861-4c5c-4fe9-a76b-89d8b33198f0.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 0xc5315d83f50c6da96fcc13d5ae68f932513ae73efae20efea9b78be59df8483c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ782464866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec741147b68d35daaf5dced2bac231325d472c4832989ae7d2ae8a4f73476c2b. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QT3FA2500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1103abd64d6bf399c5d2f4e1314872bd6b0fbf07ae77ebc6cbf77e02087431f8. 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/QZDA62495800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428aac43db147285bc0d19b22415277648aacab808544cb9420c5c86b4b84c82. 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/QZK6Q2433482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a185a9dc8bc120f239f3d39c84a763d348b577cdf279f4ca9f6ca4a9e36aeaa. 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/QZK6Q2433483.
たいせつなこと (feat. 初音ミク、鏡音リン、鏡音レン、巡音ルカ、KAITO、MEIKO & 重音テト) - LIVE
初音ミクシンフォニー〜Miku Symphony 2019 オーケストラ ライブ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf527d1a0f59fbf218941114bdecf960ea08bdbe60e1282a2d474711e1c07b418. 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/JPWP01971264.
耳のあるロボットの唄 / 吉原ラメント / おちゃめ機能 (feat. 重音テト) - Live
初音ミクシンフォニー～Miku Symphony 2018-2019 オーケストラ ライブ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c83b9845a14be1f27e526c32a53230ee0d980ccc526137768803fef0ad8aef8. 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/JPWP01970214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c188c7f50c3af8565b552096a63e911f0f8c4ad899e15cde2c3f711d86d391. 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/TCJPT2229085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eece93669821dadec9476ef0d0a6efa70f0cc0c9c1928a0f55984fbbb7fd7c. 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/JP92Q2301509.
Mela! (feat. KASANE TETO) [Cover] [Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817987c8015d4e1c5c8350ab7b304b149936f44de04e03d3e5df7cb90693c1f7. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/JPS532400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd209072a100a4bffce5891b441790e4782b0d905d7014516d6ac553989c5701d. 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/QZTBA2301443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c058250fdd0869b6bf322244d0a68fb1ac8612b0c50269f02a29324ce135781. 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/QZTBA2301444.
Please love me even if it's a lie (feat. KASANE TETO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42956135a7921fddd39b07f590eceb77c5dd976d8fee5d31ad08f5ba9a82f48. 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/TCJPS2283185.