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 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 0x576e20a21c0ec7ed8d1acca02c36a815d65433ed2546bd05b9b606e235c1cce5. 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/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 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 0xdc435fadd12b1f46403bcc85853c068ec0ec0ccb7d29a8ecfd111231a559626f. 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/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 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/KRA381500524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427a53908629595e374321c61fed40353a6402957786b8d8c5e854e0eee31c02. 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/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 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/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 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/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 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/KRA381500539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf392d2ba11d0291e3bae5039917677da7f1a34bf9a7f2f6ea8710a6670d9e783. 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/KRA381500528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec37d15b848e45672a6f6aaa22a09780cdfe689e034da18e8c41ad8b7fe1a9d. 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/KRA381500540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b1ef09d75efa9cfe53bddda628e9845fb292f079b268b4544893bd5f25bbef. 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/KRA381500529.
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 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/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 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 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/KRA381500534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b801987029690b4494f2cf57a893a7ae62ff921225079690f74055876c1dfb. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/KRA381500546.
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 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/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 0x7df6a67f705218e75995d063b565f8d3647240d36273d245fea18345b9c3e18b. 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/KRA381702666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df6a67f705218e75995d063b565f8d3647240d36273d245fea18345b9c3e18b. 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/KRA381702666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6920a02a57b3608193324d3ff3f05d121c9107e7ac4aa13117e598a9c5952f46. 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/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 0x59c47967ee16e887899971b9a6e869e8bbda13ef10d651b1938b348b8c0c1360. 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/KRA381901930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b683253cafbc5182ee87a8fdd4411b627b6f3c73b7c0a3b66bf1fa05a764cc7. 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/KRA381901931.