Laboum (; stylized in all caps) is a South Korean girl group currently under Interpark Music Plus, the group consists of: Soyeon, Jinyea, Haein and Solbin, original members, Yulhee left in 2017 follow
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 0x8f3369d3da5195f52292a3fefe6329f81832d32aabf5c1959ee01cd4bce35485. 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/b7362425-9922-43ae-b1cb-f0812a565855.json and https://artists.proofprofile.net/proofs/artist/b7362425-9922-43ae-b1cb-f0812a565855.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 0x939258f6a4e3d5d8fc9f770e334c0435442a6d21d25dd20c7e080350d155d64b. 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/KRC611900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd83378b95f59540dbe4131d326efb1c91d77fa105b7a337c43f08dab3bb589. 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/KRC611900004.
Actually, this is a secret 사실 이 얘기는 비밀인데
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0bfecd8cf3204a7d0b2c9a1da5d10ee4f742220b02dd862538fc8f6438c046. 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/KRC611900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e42eef36ed1da3af07b3ac4c21aa006f2427f84549e33e485b5e8ac4e5d11e. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/KRC611900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0d7ef27d4edffdab73b8aa31a49c3c8cbb054c4b45706d315e9bc89b926578. 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/KSA012136010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98eac1e97d104bf06df72df98737d1c8df29d20ba73f27a88357b8de59bed48e. 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/KSA012126838.
Fresh Adventure WINTER ++ 상상더하기 WINTER ++
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a34fd842258363f9f214f0a642319ce6ec9eacda5354f726754fec0ff81387b. 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/KRC611900011.
Spring Turns to Spring Pt. 4 (Original Television Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24b2e23b996c43e19ae5a3a95ddf90feca42503a49a7a4e74c44699e06321f8. 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/KRC611800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e007a58478b9c3135715c1aa251a9f0320ee31cff4e2f307d939f04ee14220e. 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/KRC611800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeab3de95294376bfc214ab4f2e28d213e25deb6a715a865d0650fb19f0cf18. 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/KRC611800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280975b2f47ea65e3f8055519e6463c5c82ef5cdea4488fb223b86ce3d06e32f. 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/KRC611800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58df93bc741e16a07c62a48592d9796179c86ac0ab0f269b74de2c3053315a90. 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/KRA341754152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e97c015894b23ca887032450dc72ab5248d72a2d14e55426a5e6255b17a5ba8. 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/KRA341749424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c5c693740a8cdc851527ede63760b3a9a7d5670df8f499537c939e51731dff. 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/KRA341681921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662c95c2eda70d5be4c7c5241a467e9e59636c34ff2e546d56dab2b8bd82b637. 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/KRA381601592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb028cddf67b3d7b60cce523c559a3b34916f8443792c32c0ee6bafcb5a81fa40. 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/KRA341617106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f2deb2964ceb3a0936e4b5edfcda94c9bbb194b9517805aad95b4bdc70db4b. 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/KRA341617107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c456af812a543b2f9c28904e1cf443dd9b0e4021c97b6ddf94eeac555dfb9f. 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/KRA341617108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d12d55f5a85f4acb8d1917f6a6cd5ea67d1e883b9adcb3a94859f62b244fc88. 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/KRC611500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f010e7d3d3d1ce4b990ad35a7ecd819b7915a3bf735e694155c0f789c4fd50. 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/KRA491402232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02bcabb3864b7e6a38f9731e5739a9d3aa955baaa70cad9de5bee1b6646a22b. 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/KRA491401736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe0b6cf9dc7068825a38fdd0f39de1c62e024934e3d338b094f3612a1d61f19. 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/KRA491401738.