The Haeil () is a series of unmanned underwater vehicles (UUV) produced by North Korea. First unveiled in 2023, the nuclear-capable Haeil has multiple variants, including three named variants: Haeil-1
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 0xb5cc9d0a75de9b51e3540973d38fe43009d68e404f4ad373c0c6cd3ce0d48ac7. 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/ddb77c9c-c621-4bab-8e77-cc13f342b40c.json and https://artists.proofprofile.net/proofs/artist/ddb77c9c-c621-4bab-8e77-cc13f342b40c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
On Me (Prod. Kang Yujeong) [Chinese Version]
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 0x7c05402212ba3a146e55f9a68778de11a772f344ba9131e2891e603d61af25a8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/KRB462000399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2dd50ca7813dc84c53284b7d074de79f54f2c0807f9da5f47941dbe1fcfbc8. 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/KRB462000734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd228b5ec8064ebd83fce884e5b2e7cef48a796eba6f9587bb83700e8eaf1658. 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/KRB462000735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab0230c47f33518daddedfb29a10e1d2f12614f0fd0776d8c16268f6cf68e30. 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/KRB462000736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680431cb4187b11272f63bbd4c9a47f27c27e301a4141fc8b4d75307e0bf7743. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/KRB462000737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2f071a6d331f3ca174ea8196f1700a017f2ee2869d2f6e9263ef732f14dede. 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/KRB462000738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08ab509cc510df2e062dc8813b93b5cf8e0fac4abddca2efdb7bec2caec8583. 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/TWA472005001.
Surveille le Ciel (Commando) (feat. Haeil)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e3806e9d32cc04891bc14b2fea227c85e8f4c92b3b4a75c881d87684c22d28. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/FR9O62000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9682dbcb607d2a0252710a793e4b6bf29c0f31aca38d4f104e446661db7888f9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/KRB462100545.