Jung Kyung-ho (; born February 14, 1986), better known as Night Tempo (), is a South Korean future funk producer known for his Showa Groove series of remixes of 1980's Japanese city pop. Jung started
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 0x449261a13edf386d686712edf16dd0766a46cb8d58a83fe323ffe4e2e6c03e7c. 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/9710d3a1-de73-41ad-b9e7-2871ad419f98.json and https://artists.proofprofile.net/proofs/artist/9710d3a1-de73-41ad-b9e7-2871ad419f98.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 0xe342bc7d3b9c5852eb97a61d7ee659ec3f7c8e2ae3fe4e3693336c7f4a6256da. 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/QZDA51976760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2af6e0ffbd068327a0e7c40c16bf1b4135ab926179afdd12e4e9ae736bfd685. 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/FR10S1951109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf219ada1a75329bfac72d4a15be86fd73f3070d4453095d5d20139d46e2e39f3. 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/JPPO02104202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e9283feb8f1ee6fb7e3aaeb73eb02abe59f6dc1f788fba4b1d771c8fc96ee0. 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/JPPO02200954.
Yuki Saito - Night Tempo Presents The Showa Groove
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03847bcc6bc1536947efa00b468370ed6775b8ba2e53c7edd8e7f6b2615cad0a. 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/JPPC02000525.
Straw Hat no Natsu Omoi - Night Tempo Showa Groove Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4390fccc3ffeebf7e58241901dce154b2af6bb891964cec3982130d22e9cb4d9. 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/JPPC02000526.
Night Tempo presents The Showa Idol's Groove
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa548add0173f99064f60850ccfafe6d9d20614caf56b99deacb371e8359645d4. 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/JPPC02100717.
Nice-catch! - Night Tempo Showa Groove Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b08c845553806173879d458b9e19f1ee323cbc6642c50fe095ca709e58a655. 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/JPPC02100719.
Arashi no Sugao - Night Tempo Showa Groove Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6c624e0ffa3502803346ad8c1f3e507060c4afd6f89f839b424bda2ba22526. 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/JPPC02001013.
Give Me Up - Night Tempo Showa Groove Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8216855eaaef5ed9a0836ab79aefb3aa0eab2e9743c31a5c5ae0b614a7576db6. 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/JPPC01902504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4390fccc3ffeebf7e58241901dce154b2af6bb891964cec3982130d22e9cb4d9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/JPPC02000526.
Dakara Touch Me - Night Tempo Showa Groove Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39da0446979af68ccba54ce1cddcd2471fe3b097443da04463cfbd76183688ed. 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/JPPC02100720.
Sayonara Shigan - Night Tempo Showa Groove Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4d98f0410463ce3e6bebc6278fcfcb524588a87d82d395791a93f79ff2a12d. 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/JPPC02100718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03847bcc6bc1536947efa00b468370ed6775b8ba2e53c7edd8e7f6b2615cad0a. 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/JPPC02000525.
I Don't Know! - Night Tempo Showa Groove Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe67f114be5b04c416e49f66ce1f29cea05e3cf3981594588583593d6841dd13. 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/JPPC01902505.