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 0x514fb3f5f768476b44d9734a898fa44a4c74a87ca525645a702451552dd403ea. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a10c2630-de67-43fd-b7ec-4905f0aae996.json and https://artists.proofprofile.net/proofs/artist/a10c2630-de67-43fd-b7ec-4905f0aae996.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
So Nice (feat. 고영배 & 권정열 & 김현아 & 오지은 & 스윗소로우 & 토마스 쿡 & Lucia) [GMF 2012 ver.]
So Nice (feat. 나무 & 나인 & 박솔 & 박원 & 제이레빗 & 조현아) [GMF 2013 ver.]
So Nice (feat. 박경환, 배인혁, 윤성현, 이지형, 홍대광) [GMF 2014 ver.]
So Nice (feat. 계피, 빌리어코스티, 스탠딩 에그, 안녕하신가영, 이현송, 주우재) [GMF 2015 ver.]
So Nice (GMF 10th anniversary special ver.)
So Nice (feat. Gu Yoon Heo, Sam Kim, O.WHEN, Yun DDanDDan, MIND U) [GMF 2017 ver.]
So Nice (feat. Kim Na Young, Martin Smith, Sunwoojunga, We Are Young, John OFA Rhee) [GMF 2018 Ver.]
So Nice (GMF2019 Ver.) (Feat. So Soo Bin, Stella Jang, Oui Oui, Lee MinHyuk, zai.ro, Isaac Hong)
So Nice (feat. So Soo Bin, Stella Jang, OuiOui, Lee MinHyuk, zai.ro, Isaac Hong) [GMF 2019 Ver.]
So Nice (feat. J_ust, Yoo Hwe Seung+J.DON, Choi Nakta, YEGNY, HYNN) [GMF 2020 Ver.]
So Nice (Feat. LUCY, Hoseung, Dabin Yu, Yunmin, Jang Kyung Min, ARO) [GMF2022 Ver.]
So Nice (Feat. LUCY, Hoseung, Dabin Yu, Yunmin, Jang Kyung Min, ARO) - GMF2022 Ver.
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 0xce7943515e0b3aa64246cc2eebf9edb0cedd1fb98809cca7299d53da7fb15f00. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:10:41Z), 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/KRE892200111.