015B () is a South Korean music producer group that debuted in 1990 and went on to become one of the country's most popular acts of the early 1990s. The group name which means literally "A crow flies
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 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 0xa18bfd9d11b007f4aa78c2610122406a653d8119a85975b7cb7d0905a9b5b8cd. 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/0d1f70b9-5bd0-4894-a51b-7d46e04651f6.json and https://artists.proofprofile.net/proofs/artist/0d1f70b9-5bd0-4894-a51b-7d46e04651f6.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 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 0xfa00824a054bc8eaed1c6e8ecf557d0cf498a38d9f83bae199d8da19a4afdbfe. 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/KRB471800950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d9571994459cd9dfd6eece61a0a0feb5709e2b9e6641d269fc59caeff1d967. 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/KRB471801211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f41afc70b421b757c7b4db31c5e51f9f7d02f88f7edfbb1b00515538145344. 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/KRB471801935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bd1aa6ad447bf82650605d87c33628700c5f8ae7ea696e2ddfc8326c4a6f6e. 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/KRB471900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d1fda51f3d90dabe21a3b192e0ae5eafda7daf0ece09ac2f2f5a5f18d1ef2f. 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/KRMIM2218021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92dcafc6551f1fef51caaa0f48bdd3235d145ca697fb0da153d7c8d40cab24b. 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/KRMIM2116770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad142802a1a8d4c5f09b0e9a400068ab5e82c1e5dacf599f2828520a4d9edb73. 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/KRMIM2119470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f9682d3c1ff10dfd3133cb30104191d6b4a7afe5d00137d44b2c66c83b2d1d. 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/KRA340900573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b90bdc4a15b02b1ce1e8e5bc914faa189358b847257196dac7c614b7dd1f6f. 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/KRA341436137.
To you Who wil listen to my song, somewhere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29ef98364d188728004cb7328999060b78d477b93856ed17a24f8876bd57b1b. 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/KRA340902428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ec253ad3786ba3c1184bc31160c6a25635d5e9d6c40b038e3d72837e89516f. 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/KRA340902431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa498a7b394d4a9a2faa3ceab04bfb733207c90f13ec65949aa69c12e86f84711. 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/KRA340902433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb368d14dd591fd842c97dda3f1ac9ebc3a8b70f2e9997c50464d432337ad65cb. 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/KRA340902416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f96e2fd58bb6311683517863326ce688119ae8459fe64616aa9a7b617fe678e. 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/KRA341436125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee0c42115a6ffd963a704a4849d24a9d4cde6fa8bc865238843fedb02ff8b87. 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/KRA341436130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d4de0322c19c7ef87e3ba4c7c983ba7416c347c103715bcf85ccaf8a27f39c. 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/KRA340902406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd331ca67a15e1d00022bd8ab9f3e46e02e6c118df6d93ec3265742088b5719. 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/KRMIM2505283.