Kang Ji-hyun (; born February 12, 1992), known professionally as Soyou (), is a South Korean singer. She is best known as a former member of the South Korean girl group Sistar. Early life and educati
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 0x576e20a21c0ec7ed8d1acca02c36a815d65433ed2546bd05b9b606e235c1cce5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65713453-350b-400a-8570-aa0daf5fab4a.json and https://artists.proofprofile.net/proofs/artist/65713453-350b-400a-8570-aa0daf5fab4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Guardian (Original Television Soundtrack), Pt. 7
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 0xdc435fadd12b1f46403bcc85853c068ec0ec0ccb7d29a8ecfd111231a559626f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRA381500523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2afa54a450c9e47f461776d66207defa927d525ab99a73e33ad4de8c16af38. 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/KRA381500535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3b042a183ec7ee0a31b20e83f5b8591cddf18714f1adb1ebf04eb4bc5c5f17. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA381500524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427a53908629595e374321c61fed40353a6402957786b8d8c5e854e0eee31c02. 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/KRA381500536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07729506f1d868f5fd38db3b31d026d68358985591372145a3ba54f07de9c7be. 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/KRA381500525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffd7932256b783929ba5d99895429013287e751cac80a18723d4a8f1d47c340. 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/KRA381500537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8d91b8a5020227116643cc2daba56ff805f77b6cdcb82d2907b346a1831013. 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/KRA381500526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733ec9af51115824b85e3cb60d03bdcb0ecadd65f1b5d7f6c6726bf7e36af626. 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/KRA381500538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c7023d95811c51e2383dc1ddcaf35dde43ee239fc9496d3144b3bccae2e6fe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA381500527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd9e6095de545f4a1d37a004d296cc723e42e2b8d798475475901e108c8315d. 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/KRA381500539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf392d2ba11d0291e3bae5039917677da7f1a34bf9a7f2f6ea8710a6670d9e783. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRA381500528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec37d15b848e45672a6f6aaa22a09780cdfe689e034da18e8c41ad8b7fe1a9d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/KRA381500540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b1ef09d75efa9cfe53bddda628e9845fb292f079b268b4544893bd5f25bbef. 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/KRA381500529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01856e45efabf2966f80b6dbd8945ade9b131f17572ae655f8eeab8c3df763f. 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/KRA381500541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5450bf5c9b8b81fe13a539c40f3ffb7b50e9b897bad9a25d0aeec1e7c39da260. 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/KRA381500530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887127045c0d340091eae23dbcbdf1bc8facce83aaf4fda074e88632fae1d5eb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/KRA381500542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83acf581adac63b9fe939481a82a1803b144820ef28479d09819c8325b945db6. 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/KRA381500531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc8185e97bc5c1b3446b6898958e3381c73288d89efcc6d42e2df6424aad325. 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/KRA381500543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacecf5c6171ff86f0c7b4494b3de6d34546d4ec20526e9aba96b49f6e399c813. 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/KRA381500532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef006eb27e7cb13af5da98ea7c6e40e07dff8c32388877710562de9a14f4b92. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/KRA381500544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd287c9a0a221d507b7c2086cfa80457439f1aff9b1e1d51c3cd1941ad89acf3f. 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/KRA381500533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99eaa5fb277b01303388db06650b6f5edc1c8f71d63f3ca356e8a04a0c3c53c. 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/KRA381500534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0905fe8327a937b02082f08b35fd840629c0ada22a4f9c57d66d9bf561639311. 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/KRA381500547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd50961aa08788b6d278f665a39398b68e082218ffa798b34a274c555f85d79a. 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/KRA381500555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b7864ae20eee48b28ea53be9645c74219eaa12dbbfb3edf240f36c753d0382. 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/KRA381500557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a875f1c12b443416686b24456f590d2cb48d5c2a615ab0d8eb009fdbeeccf7. 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/KRA382100771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a2fe370b5f44929b0f3fb26aacff3c10d2172d21dcc39825547b6255c932d6. 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/KRA381700318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f55c3ad225ba05c4134e199dc828d495c6f1f0eaea7c16f3eb50fd11fdb1f9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA381702073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f69c9b76664e283875849d163e0d3f163c124787a1283e1490efaf32d9de9da. 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/KRA381702824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51264a533c53121f934529ad30e69133fd2009d9efdc113a35943133f1005688. 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/KRA381702826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffb9dae6d96e34fce4bb9832e431690727cc63ad95704fc6cb4a6c022846de0. 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/KRA381702828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df6a67f705218e75995d063b565f8d3647240d36273d245fea18345b9c3e18b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRA381702666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6920a02a57b3608193324d3ff3f05d121c9107e7ac4aa13117e598a9c5952f46. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRA381802203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb60a101d900df4533ecfa05278c2859a14090a5e90d1a667f03592ceefc8191. 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/KRA381702785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0232d7bf470b4af20e2b9f577693e21368dc618e6d4101c73dda3a04233a5409. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/KRA491900656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc3214fe48cafe0be3964b577363fe6fc40dd21adba7eb3dd58385a96be314a. 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/KRA491900489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1e70774a7336c3e8353fcef3808f1273def7f98536ff8e4d9eae05b82f23cd. 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/KRA491900726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c47967ee16e887899971b9a6e869e8bbda13ef10d651b1938b348b8c0c1360. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA381901930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b683253cafbc5182ee87a8fdd4411b627b6f3c73b7c0a3b66bf1fa05a764cc7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/KRA381901931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113b4b01a6c5816206cd882d710aeda49b69bec514d218e44baaed26c74a4c07. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/KRA381702825.
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 0xe6ce49c05f513be85d8399d1a50b4eb28ef5673a02cce53ee1af0e2f790e292f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/KRA381702827.