Lim Jae-beom (; born January 6, 1994), known professionally as Jay B (; stylized in all caps), and formerly JB, is a South Korean singer, songwriter, and actor. Jay B is the leader of South Korean boy
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 0x263017157a7ce7e53f9e97e60638fde257f8b379b5e2c1b60afc775e1e5d25d7. 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/c2bb5d55-d6ab-4d4d-83c8-1eddee4d5e30.json and https://artists.proofprofile.net/proofs/artist/c2bb5d55-d6ab-4d4d-83c8-1eddee4d5e30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Package (Original Television Soundtrack), Pt. 4
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 0x0218c124a12b69b5d4fd6c32a742144612bcc306d4029ca11325ca60173aa005. 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/KRNAR1708171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81304e12d27d7dedea72f8aa5540d6e0b4a89ef748eb077dd561ebbf7f5aa90b. 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/KRA382164315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf19a5a16a4508e086fec14ad0df25290d99d1045f35bdf41addf3d7222917da. 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/KRA382164316.
Good Job (Original Television Soundtrack, Pt. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f03a5f280d2cfcf938e895cc83d8f1dbb2fb44667914006c24979cae00aabe. 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/KRB472201473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8717d6310e619456a8d9d9c94c95b5aa0c9e2b25231721be3c7019c5e528748. 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/KRA252300237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d88ff9d7d2fc4b4b8d3d5abd6057c2acdb006820604f5a14abac3b0fd334ba. 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/KRA252300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eef30709212c4d20482f9cd5608cd1e64ca38cc677ef21619fbb49efa24074b. 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/KRA252300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfd8b21a4b17e86ee2219911b21fc2731b8d48f8444a7b159b764ccc9c2781f. 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/KRA252201699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9da965eb7fc86422f6854ebee7de37ed1e5b830fb014f367bbdb52e2ee34459. 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/KRA252201700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8e378e493b89f2ee2b352520af497683a8020203064c6ac9cba606f77eff8a. 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/KRA252201701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fa597d176b4f23302d346d2cd4fa6d37c6625dfe8a6ea6266827f493c6aef5. 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/KRA252201702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3041ddc09581ae51840a2f4a5dec675b09a02f18a3445c3f08ef66e03b37120. 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/KRA252201703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc1825ea4c0974bf446606ce835adba50fcc0f56a80ce9b3e3815ca75ca6cca. 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/KRA252201704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ae0912095b643f8314033f04bf75057f906022b2106165a87c1d5395477440. 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/KRA252201588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365d507a61a58fdecd97fe8c0a89e6feef0637f4c164f590b602ad2f8c64e6e2. 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/QZEKE2084688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5133d5f7dabf0e6db4f6423a319a00cf818524e379280891da2da610b0513c. 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/KRA252200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd489edd1cb80ce937b4d24977d0a9af6591900593cc9b0a9d25e904047eea38. 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/ZZOPM2223317.
B.T.W (feat. Jay Park) - Prod. Cha Cha Malone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6367181e7d8ef80b578f5e1e4a4cf74ccb4a9fe3d3fd67cb24207b7a0679d0. 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/KRF152100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9996598cc06dbf5ea760f534e1f75905dfa3426d47579c1c89d0c451e9d0d02d. 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/KRF152100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2ebeb3f5c313a2d1cb4e90a8f33323b18e845b2fa70ab858ca6fc50e9d262e. 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/KRF152100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd571981cb87f8967160a5f72ce0732f30ba5ac547574a945762d049b557fdf9. 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/KRF152100027.
Switch It Up (feat. sokodomo) - Prod. Cha Cha Malone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf801858e47bfae67615e5c07c1395a37a7a9d7be419c0b32cbbb53ffb40b0fdb. 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/KRF152100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07bd452f37ccbb6e86e16434ff589e1df6a3c34e4c67898bdadf779abd07b72. 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/KRF152100028.
Switch It Up (feat. sokodomo) [Prod. Cha Cha Malone]
A Day Before Us Season ZERO (Original Soundtrack), Pt.3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25dd783a77590b5d0e2ad7103399865130d93a0c6486bce2f2080d701b18939. 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/KRB471900149.
I'm Surfin' (Gangneung & Yangyang) (Prod. GroovyRoom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3fd8b3350a87c0781c3305323a6fdaeeaee1ddb0e334e6561b54230347f13d. 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/KRF152100031.