The Wangjaesan Light Music Band () is a light music (kyŏngŭmak) group in North Korea. It is one of two (with Pochonbo Electronic Ensemble) popular music groups that were established by North Korea in
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 0xb0c0facc3e276e4a68ee33817a6d1be55ead6eadb1008645cbc4c79869affaf2. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab2def1d-5e9d-4c39-9f04-835f8f818d93.json and https://artists.proofprofile.net/proofs/artist/ab2def1d-5e9d-4c39-9f04-835f8f818d93.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 0xf65b0e036bebdf9080caa92530de860fb35a3eed51a06d10ae4c506191838715. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/ESA012442467.
Gems of Korea: Special Edition - Volume 1
Gems of Korea: Special Edition - Volume 2
Gems of Korea: Special Edition - Volume 3
Gems of Korea: Special Edition - Volume 4
Gems of Korea: Special Edition - Volume 5
Gems of Korea: Special Edition - Volume 6
Gems of Korea: Special Edition - Volume 7
Gems of Korea: Special Edition - Volume 8
Gems of Korea: Special Edition - Volume 9