DJ D.O.C. is a South Korean hip-hop trio consisting of members Kim Chang-yeol, Lee Ha-neul and Jung Jae-yong. DJ D.O.C. stands for Dream Of Children. DJ DOC released their first album, Sorrow of Super
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 0xfe05cd14f3cef910bb19216df91ccd86da2e50a08506233d195772303798575f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a67492ca-5d3e-4cb4-b0e3-4aaeb776613d.json and https://artists.proofprofile.net/proofs/artist/a67492ca-5d3e-4cb4-b0e3-4aaeb776613d.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 0x7340d8633a45b5985fae90cd2c99aefc844f128f6e2986e3ff75927ce2b5f683. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/KRRAR1625019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb26321fe21766c75a3cdaa6a5390787b63cd7bb0c267e717e169a4236649d3. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/KRRAR1625020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62909c6e526ad07d43d24d3c6b3f206c6573dde32542f796e18cfd922e86983e. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:36:31Z), 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/KRRAR1625027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359c598ecb8d24bc9f8363c24d22df5b343466e13394eefa7e679c92ac5b58e0. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/KRA340919035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc9968311caab3f069d252d598a3033a763cb9083d4f5ea4c5b80f2599c8690. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:26:47Z), 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/KRA381900848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9594c56288121ca821f7efe9d86e79e8a3081fc3509d5d418553b5eb84b9a8d. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/KRA381900860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dff30813c0e4b241a03aa57a373c5eb600888b6e82987befb36bb1b0729e4dd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRA350800589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb69ff560178a11273a6f34ddc01baa264e85758c61e316a1c13e675cb455d4e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/KRD451801771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27995363382d93383e6129f913b2848d7cc11fd38bfd6559033aa30fee128aae. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:32:10Z), 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/KRD451801772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789ff734cd1a6f7a7a7ea21f27c2a6bbf7abcadba63769fd0465de6ea21a41c2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/KRD451801774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc714514993e3387005a539bc9364da98e72e0632a84ef6b8c2c791464e107fcd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/KRD451801782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27995363382d93383e6129f913b2848d7cc11fd38bfd6559033aa30fee128aae. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:03:40Z), 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/KRD451801772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789ff734cd1a6f7a7a7ea21f27c2a6bbf7abcadba63769fd0465de6ea21a41c2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/KRD451801774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a77cb93bc0d104e169870673a81959d4b66f48f58e8d39ad009b9ac95bb90b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/KRD451801775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a01340e41adcbbd41e1823681466911606873e3cacad38a70ce84a64eca1bdf. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:05:48Z), 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/KRA350800610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8f453e666a7deedaefe935fcc3a2bc92d428916c0048a5b51b0649e4ecdf2c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/KRA350800613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5b6cc03addfc2b72c62c97268bc8614d6a3dc73df7b8d3601eb6296f02660b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/KRA350800622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527e7e9cb0239fcd765f418ebc14197a30871276c53d9ccb80b13fd0069dcbda. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/KSA012363019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb69bd2a6840f3c0724419809e8c42c577c0355348c17a601dd8bd2467f1873. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:19:51Z), 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/KRA341654008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10907641459c8ca265f52408ab8e71fa9da7061c1293d5959d83c8aef6d7803. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:23:56Z), 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/KRA341654010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedba5e4393b42c0d2aff0f2a35b139c615a5a98610570759a4b056b7b7a746af. 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/KRA341654015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1084a35fd2c62d75647657a85cc4a5c606161d600af8f18d0332fb5d9acaac. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/KRY661430075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bbd2ed46cb580f3981f085b8dcb524b62b3e3e50c460cdafc0859aa2881adb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRY661430964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c6c9b52293422ee75adaa3b3e34028bc6b5e479707fd58dfe3d74cf21d8afc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/KRRAR1707002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdbfca02063e25775bef39d843a2132e80e46d93c22e0d7bf8e07b29bb6bab9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/KRA491700157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8a5c8069e9aaacd0b2dd149c7d4a0fab448c7b1ac697e1d8f51c1f38454722. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/KRY661430875.
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 0xaca36f1375b5907e6027a8933c9d059ff1ec0d5cb8d86c096d0713a26fdb4b69. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/KRY661430183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2328600112d2980232fba40537f79adfeb82fc2b941b3c15dcf9270f7da067c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/KRRAR1707010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eca4ddae4295da0b2e931aae53a9ee2e83bb4bd77e7f17e84c7613a57ff3a33. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/KRY661430873.