Kei or KEI may refer to: People Kei (given name) Kei, Cantonese for Ji (姫) Kei, Cantonese for Qi (奇, 祁, 亓) Shō Kei (1700–1752), king of the Ryūkyū Kingdom Kei (singer) (born 1995), stage name of
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 0x7543e182f8e92d207a2e8cedb36843975adcf6679c57bd1c12a6ebc84c116d78. 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/76665d13-8be7-4c9a-ad23-bcb20316213c.json and https://artists.proofprofile.net/proofs/artist/76665d13-8be7-4c9a-ad23-bcb20316213c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Emperor: Owner of the Mask (MBC Drama) OST Part.4
추리의 여왕 시즌2 (Original Television Soundtrack), Pt. 2
The Last Empress Pt. 3 (Original Television Soundtrack)
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 0x299967abc88f17bf176aa4769c9101d05c5807ff249f0da77761639afda0ddbc. 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/KRA382007071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d33e8ebe64f097e047cb34a98acff18789eac5b163d5fd324b033b2d1f2a8a7. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/KRA382007072.
Midnight Sun (Original Musical Soundtrack, Pt. 5)
Start Dating (Original Drama Soundtrack, Pt. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5007de78ee27ee169744a4be6daac886d8dad367bbccd55f4852ff83ace9876. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/KRA252101190.
As I Become Your Wind - Noi Theme (Acoustic Ver.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a555b610a5ea13ea11cf82f56844a8b2fec08080d026b4fb566df71c70ff39. 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/KRA602100601.
The Wind Blows on a Star - Yugi Theme (Acoustic Ver.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75ada2541f76b1d6ce6dcd9e94bfe384f4d862f74a04a21aa807d0989071d69. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/KRA602100602.
봄 빛 (The Light) <Kei & 엑시 X 아이돌 작사 아이돌 작곡>
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67241670d9f1debf559af565c0b016a72d3433ef29adf665b2312ceb5d8f4587. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZEKE2084700.
The Light <IDOL X IDOL (music & lyrics)>
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ba1ac5d315fe784e330adc43605606c651de08c5f95c6527f1b44367ac4f78. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2220611.
OASIS, Pt. 5 (Original Television Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca044c447dfe0e13d50044ee567dd4d84cd0fff6f7b07c49a837971c9a1c19b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRF142300008.
Tale of the Nine Tailed 1938, Pt. 2 (Original Television Soundtrack)
Tale of the Nine Tailed 1938, Pt. 4 (Original Television Soundtrack)
Summer, Love Machine Blues (O'PENing) (Original Soundtrack)
Dreaming of a Freaking Fairy Tale, Pt. 1 (Original Soundtrack)
No Gain No Love, Pt. 6 (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bad37363b4b0a21a05dc97c833acb7dcdb65688a635bd34325765b27afc10fc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/KRA492401225.
Good-Bye Days (From "Midnight Sun" Original Musical Soundtrack, Pt. 4) [with Kei]
Meet Me When The Sun Goes Down (From "Midnight Sun" Original Musical Soundtrack, Pt. 4)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4271fb1d242740d861aba162605576447a527b10c0a3da4a4beb0871954326e1. 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/KRA252100881.
Good-Bye Days (From "Midnight Sun" Original Musical Soundtrack, Pt. 3) [with Kei]
Meet Me When The Sun Goes Down (From "Midnight Sun" Original Musical Soundtrack, Pt. 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2371d4717ec75c40ab5849991187a096806d8d1e95f10c7235769aeebc0b69. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/KRA252100600.
Dreaming of a Freaking Fairy Tale (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f02aafbec0ed4677b480b558a9151235fb6dafc3f74c6d2c80c82c3e6894120. 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/KRA492400675.
Tale of the Nine Tailed 1938 (Original Television Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d78e7fb605227162a862eaaf0cadf7201aca93de4b52ab809009189199eca0. 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/KRA492300380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66c3c0bb520b305614e9eb7436ff87b30b4102c044bc8a0309af082462980fe. 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/KRA492300474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299967abc88f17bf176aa4769c9101d05c5807ff249f0da77761639afda0ddbc. 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/KRA382007071.