Drug Restaurant (), formerly known as the Jung Joon Young Band (JJY Band) (), was a Korean rock band, formed in Seoul, South Korea in 2015. The band consisted of bassist Jung Seok-won, guitarist Jo Da
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 0x94624b05ae26459bd577859d42bd046daff842b159bb6a02a2877700533349fb. 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/c796f3a5-cde9-4c93-8cba-2d4d17ffc5a9.json and https://artists.proofprofile.net/proofs/artist/c796f3a5-cde9-4c93-8cba-2d4d17ffc5a9.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 0x5ca17320417737209acdaad2275aeb30afb3c484654c4981a7192a38478e59bd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/KRA491500546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e17aa5db0a4a504432ca96216cc4a532966ba6ee926e0de1cfb702366d44333. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/KRA491500547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0839c5aec6dff7ead5143cd60fde5105afe24af3011201c1af02ad6084a0eb4e. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/KRA381601016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7859efe267cfc89217ea0e564670b28d86183be5ce34283d30f7f75a6e39d574. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/KRA381701828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64e60d1df7acd2706fab195430f5b0e53ebc8989acf67ca442429d5a55792ba. 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/KRA381701829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc142a590c71f8c70596b9c3021fce88826bad8ae60e6026706716a5c57cbde6. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:42:57Z), 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/KRA381701830.