Lee Doo-hyun (Hangul: 이두현; born May 6, 1980), better known by his stage name Ra.D (Hangul: 라디) is a South Korean singer, songwriter and producer who debuted in 2002 with the album My Name is Ra.D. He
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 0xa569a0adde28f409b94d85885afbc47a1743ad946e8cb988c26c560d0c858623. 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/2e8966ff-2dbb-4a39-a59a-8a1c87fc7e86.json and https://artists.proofprofile.net/proofs/artist/2e8966ff-2dbb-4a39-a59a-8a1c87fc7e86.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 0xac5db0322f9d6276d08422e80499878f97000206eaeac091d41d758551ea23b9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/KRA351000261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c6568c295ddd06ece8a871f424c56d8bc10d7435ee4cccacb571f46a3bc424. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:22:35Z), 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/KRA351000264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553975eb14a7931b2ae842947fe523dd51f9df7fabe943a67b71a1c8bb1e2211. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/KRA351000266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a2e6ddd2d01231bbce32c938c85ab29bf860daaa6d588638ec1452ef627cff. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:21:23Z), 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/KRA351000260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d3df1a8d59a8664cadd5c65ab7f51a837e69f0e39509de29ace5c520634af3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/KRA381202694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb939725e7b78e3d10c7dbc8e2190e8a35832f877d47d627032eb1be477aaf3a. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/KRA381202944.
Dating Agency: Cyrano (Original Television Soundtrack), Pt. 3
Lovesome (From "Don't Dare To Dream" Original Television Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3922baa824454abc384088583155f3d626dae39795f57eaa803630b7998ce54e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/KRC321700027.
수상한 파트너 Pt.3 Original Television Soundtrack
수상한 파트너 Pt.3 (Original Television Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199e85d391f2bb3a557be2db6cb8f0af7542f7235c9b71e8d96e0380be83e9fc. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:56:47Z), 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/KRA382322832.
Rain Or Shine (Original Television Soundtrack / Pt. 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dbe6abc42b40a5af7f9b820b8112da3c64f877ea35a0623be4195c7d2f260e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:34:32Z), 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/KRB471801449.
Encounter, Pt. 8 (Original Television Soundtrack)
Encounter (Original Television Soundtrack), Pt. 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82b7da9bbf5a1e75d4f98d36a6f395f47a0795de9c312a27abc2370c967a488. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KRB472000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82b7da9bbf5a1e75d4f98d36a6f395f47a0795de9c312a27abc2370c967a488. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/KRB472000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7204a72865a8716296c4da7d6278f7b22995937e006ce9af5e16ea0319a1334. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/KRB472001700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf69e2832fccdce6c5cd15b089c4670085e1742d6125f56799fe5ea66feb0441. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KRB472200765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5613a6db5b1b30a73ead27138f794a141ecc5f7b90aaa49cae8fbd9c28bf4949. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/KRA0R2300435.
Drive Away3: Drive at Night (Feat. Jacoby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de0f2ea41951c69cc024ca9bed668fa787291cf7319e936f0b61543cf359f4d. 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/KRA381002296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062c7a1681be189e7e866db014a0120da7a11bb4e423f3f81dd181b9905501df. 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/USA2P1341364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd83384453f5994dfed2b33541f7dbc5d7b4c95b3a5fbe3d2144903dec4f2c9a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P1341373.
Dating Agency: Cyrano (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9353a9dfaa7ffb0ed5ce2f9705f78ba12bf4403611c397a605851d1d45e64c. 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/KRA491300782.
Suspicious Partner (Original Television Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fee4aa68c4e5eda70ed315807110e43753bf5660bae3966875c014c6f2c3641. 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/QZEKE1930852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b91f58913aba2ec87627ea6447aab7b28537806207414593086f5330bd6676. 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/QZEKE1930877.