1the9 (, stylized as 1THE9, pronounced as "Wonder Nine") was a South Korean boy band formed through the 2018 survival competition Under Nineteen. The group was composed of 9 members: Yoo Yong-ha, Kim
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 0x486a9d7ef1a7bbc3b304e8009ddbdebffc59dd1cd9773a17d172c20caad8c965. 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/41968d12-e4f1-4767-8401-0d928c88e769.json and https://artists.proofprofile.net/proofs/artist/41968d12-e4f1-4767-8401-0d928c88e769.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 0xda3a4ece106468893b1845fe395bdb47c4029e03688ad8e840464aa75db764ef. 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/KRA382003305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577c9b045abcf17042e9ee441840f5e6d58b8bb0f9f374e0bc752d0ddfacef93. 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/KRA382003306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadba66b10405fdc7e251f29afdd1a93d214408e6f65f68869f7eeb6a0b748e44. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/KRA382003308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6948301deb0794813d43111526fe85cf4e5a4c1923c10ec88152fbfedf2706d. 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/KRA382002977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf932f226cff47e3deee354c392b535a7ef679d29f1796a6bbf6b91e182182f8a. 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/KRA382002978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a67a8405036a457fd962abbe5c213d590db54e772e879d17505b603ca0d4b6. 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/KRA382002979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f0063adbca86abc98d80b508a51ef67007456c70ec882ecc466aabdeb8c67d. 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/KRA382002980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa18fa2d8302cc35f7f06d746dc6699ace3aed7ed5d40aba7850efa4191f9c5e. 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/KRA381904487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4b912c837d68482cd6dd523d9ad45506cfae810d8c11379e0dc4838fa25210. 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/KRA381904488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf06b45971a3068e85f325a2d06229d1c5738c060d13b2182a8f747a636eb32. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/KRA381904489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63a380c953fa0fea8bc1feca0eee1eb94de45278874f2ca92aec79cb2c74ea9. 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/KRA381904490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5ac2a57f7f154717779b260964ab0aebbd462402092641f5ff1dd256ab915b. 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/KRA381904491.
Domino (feat. Crush) (Prod. Crush, Gxxd)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4b32e80358052cc6ad7055e80afb21faf378254a4169d11c84bd1a2371089f. 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/KRA381901515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716eb090b46aa15c27b12848c59e8b8a3f99abe1f712af265a4312319dc53c08. 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/KRA381901560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdeed126dfaa6e628d79e83a4da40ff87ab8aa947ce9f3cfa6d506bce40aeb0. 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/KRA381901561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d4b1eb2dea7ffc876efbcc6bb1cdec8fe48996924e5a50bca8382e36f04663. 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/KRA381901562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c21831c7b83205dd3392cda2f77a3261d61e4ebe364bab5d5f7e62985bf4e4. 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/KRA381901563.
Domino (Feat. Crush) (Prod. Crush, Gxxd)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4b32e80358052cc6ad7055e80afb21faf378254a4169d11c84bd1a2371089f. 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/KRA381901515.