Laysha (Hangul: 레이샤) is a South Korean girl group formed by JS Entertainment but is now currently under S Media Entertainment. The group currently consists of seven members: Goeun, Chaejin, Hadam, Gav
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 0x47ed0002810268a2054224e979b20fb4e3e7761e438ffc14fa72f4e6e527dfe0. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/754b1ecf-1453-44c4-9501-22511cdd62c0.json and https://artists.proofprofile.net/proofs/artist/754b1ecf-1453-44c4-9501-22511cdd62c0.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 0x45ba360b2ea7a123d972d0d50b360048036bd0eee685058f8b87bed5f4fe1497. 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/KSA012337417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf744338eee905e19aba345c6690adfa70166a9eb7b30cab145c2ef274ca3dd0f. 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/KRMIM2428276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe807bddad731227f8f8b4964858499c554f8fa896c3d91bb61854656a04298fb. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/KRMIM2425664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf670f0252ed9608597afa06c2b2af9702515e835c74e2f348cd25f2b1c1e5d4f. 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/KRMIM2424721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693ca5275b0e84c6f15ea31614f729f24c029617040b7570165e9c21237ec363. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/KRNAR2311248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18cebe0f31f8571f90ec0a3c34eec071c3974b795f2f65584bfebfd157f7934. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/KRRAR2311126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e428c6dc1de53d93ddaae9ee5fa9e9d69003aeee14b1317bcba17d984fcb23. 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/GBSMU7346933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09c036a979394dede4895b72cf3dd8d5a5fc367e26150d2c672b34308897217. 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/KRB471702036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2384c00a3cbecd36df02925c0baa7a12090425de9be26dd40d830a7f48e0df21. 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/KRB471702037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a187d95fce2bd84c5709fd8fca5db9c8f1c584e4f4c67dd1a77281987a1db1. 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/KRB471601587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f17925d09171f59c9c28784c8ae51b8e475ecfc2cf4cf4251de10435e680492. 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/KRB471600971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c1d563c994f7cc9346004dd47712746ede807ebeed7920a2b1e44b6ec7d00c. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/KRB471600972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955fe98f5957f4a375b8f78be221900cd8b78b155b3abe289b6d5e50e0672e53. 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/GBSMU2120100.