AtHeart () is a South Korean girl group formed by entertainment agency Titan Content. The group is composed of seven members: Michi, Arin, Katelyn, Bome, Seohyeon, Aurora, and Nahyun. History 2023
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccc90cf2f0b6ced2fc2936ea7a435c7ddaead85ccdaff4af59e9311425555e3. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/883eab71-c0cb-4224-a496-07fdb7526548.json and https://artists.proofprofile.net/proofs/artist/883eab71-c0cb-4224-a496-07fdb7526548.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe010b884024f4f6deed19728f17c2b72c51da58f09a7ade4c9dcee9c99566aac. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/KRMIM2516453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe010b884024f4f6deed19728f17c2b72c51da58f09a7ade4c9dcee9c99566aac. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/KRMIM2516453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183fa0fd160015c4fe43b39ebc9f72a3b911697e4c087357ad2292127302571f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:08:17Z), 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/KRMIM2590662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66284faecdc28bdc564ab327e01769e9bcd9f89d9952064f352cb755b92a8972. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/KRMIM2539221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdf62788043f4a377ec824a26a21d88b9f2106992b194a8425d93f2b365b193. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/KRMIM2539222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe010b884024f4f6deed19728f17c2b72c51da58f09a7ade4c9dcee9c99566aac. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:09Z), 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/KRMIM2516453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f12a46df57a715c3cbce47a060c8fcb8b0b94356144db1134021875c9df97a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/KRMIM2539220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb105364758c1fe9f19b0ace31e0610168554e4cebbc28bcb51f241274c81e3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/KRMIM2556598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb105364758c1fe9f19b0ace31e0610168554e4cebbc28bcb51f241274c81e3. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/KRMIM2556598.
Plot Twist (English ver.) (Cat Dealers Remix)
Plot Twist (English ver.) (Tsu Nami Remix)