I.O.I (; also known as IOI or Ideal of Idol) is a South Korean girl group formed by CJ E&M through the 2016 reality show Produce 101 on Mnet. The group was composed of eleven members chosen from a poo
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 0x3b820c2950688cb121ae4b752a047472c06fbd073c4cfc3534437d10919363a1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/526dfb60-dca9-4e4f-b205-29d85eeb224c.json and https://artists.proofprofile.net/proofs/artist/526dfb60-dca9-4e4f-b205-29d85eeb224c.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 0x38fd43bc7af714b89e0557dafcd61bd678e270a97bbefef521801675f733a6cc. 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/KSA012165232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922a69a13b5acc581e968f5eb2f563cc03ac0da7afeebc7aaa8246ee98be1acc. 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/KRA381700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8293be212bccf20be71e87e3958a5a98bd0e43538725ef5b4c94297c22f0eb7. 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/KRA381602024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936bce044e6f7e0598e3d4fa8fec1343e787e8827a858b9851fea9a7d8fe572c. 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/KRA381602025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde908decf88ce742b823e06ec91dfd5e3341a07889657b3ad054eade3dcb8ad9. 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/KRA381602026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e679a51bdf79f426b390df026ab66bb488a2e88b626c5b469f8092415b3a8e. 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/KRA381602027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e3833883a5673ee3d056416e0f1b179e25e2581a3262cdd14877e53ee34184. 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/KRA381602028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02aa7cc9ee52c4ef6afec498e617f18b4c684f656c46b1fcfd3322f82f2f902f. 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/KRA381601455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd140366558529776407fe46d589518b3714c25b2688619b34b04e37e15392ef9. 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/KRA381600859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae48b54d91200e7f77feb2a14ad84a7c2384aac3cf78a2aaab2b244a1fd23a55. 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/KRA381600860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08e9bab1c328e709cb01d956369413fba92725db6fb83985327660d441d6280. 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/KRA381600861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1d5077d2f11eda135a71ebf6794bbaebaaa2559304d509a53f4379ecfb1114. 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/KRA381600862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1d577e64c2c7cf6fc1c444b1840d38ad20073b2b7058d90e71ee5c7a8f6256. 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/KRA491600235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36e05f8970eeeccdadc39becea049e0fb2be6ee2651fde96cd0b41300eecd68. 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/KRA381600863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e79a18d2cdcaddf51cb6dcd6007f42ab0f8521b238593024ddb232e64dd6dae. 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/KRA381600864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1d577e64c2c7cf6fc1c444b1840d38ad20073b2b7058d90e71ee5c7a8f6256. 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/KRA491600235.
Moonlovers - Scarlet Heart Ryeo (Original Television Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96310e6c09f45def7a3c931c36c05323a3b141f47b805b435e842493fd21c364. 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/KRA491600701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5529bbf224e325f12c7fa89d6ab6c38374ab04239271cb5cbd02173d6c602a69. 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/KRA341650521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8a83f5bbf2a59e0c1911b8f9276b5761851f8f3e33bc258a2fe426f7f006da. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/KRA341650524.