Sevenus (; stylized in all caps) is a South Korean male duo consists of Heejae and Ireah under PCS Entertainment. On the survival competition show Peak Time, Heejae and Ireah participated as two memb
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 0xe97992f2127f68dfd6bd1100edd653be4433e683a21e754d86f38b2e1327772d. 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/0ba6d7e2-d67b-4cef-88ed-6fe396768c34.json and https://artists.proofprofile.net/proofs/artist/0ba6d7e2-d67b-4cef-88ed-6fe396768c34.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 0x28e72fcf342288f277d8a59a1a93190c30202cebf7e0210a6c42c7247ae0f824. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KRA252301456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685abc7214c58590f1e80f348a3194ccaa7d066f9efc78387855a2d6ac919182. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/KRA252301457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54ca07b5486ca95dab8725c0ab7c86e9c9e866df8a14165c80667575f6a2e35. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/KRA252301458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d73bbe76844b6e353c51509711205f651a6e56f712342190e698fa4aedb1dc2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/KRA252302384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042374d951f04da9447d3aca74900aa6d42c6d549a7b46e8e72f88811c8b8dcc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/KRA252400661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9418e3141792b937a844a58da4f84bc45d2d79f77cf97f8ba6fd5caaa5d2ba75. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/KRA252400662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8324df06b199c9954d79337c82b3e88de6629fcb8ebf1a19a9259ca2c72d3270. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/KRA252400663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733569650768bf0433df356e6ef544053db6eacf70a9f951d027f1359789218e. 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/DGA0S2436348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b3eed3dcf0def18584c066b5a2471b7fb3bdf56626dedfce3e86782330cdf8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KRA252403178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9d0fe807bbd8be3b29b0549bd5e7403108d4f80c38ff3f86c59a652be47c73. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/KRA252403179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec28d56c70991a63bf48f302f538e69f514e66e0f756ced7e69f5fc3ccd8090. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/KRA252403180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdae71f19ac4da0d3a8e8810e9cc7359b801822e33731f0b65080309ad081627. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/KRA252403182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3868b55538bd5b504196a96a0d7dd5ac5a9698513c2150935b08d2ffbf8f5642. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/KRMIM2530553.