GroovyRoom () is a South Korean DJ, music producing and composing duo consisting of Park Gyu-jeong and Lee Hwi-min. They mainly produce hip-hop songs such as boom bap and trap. The songs they produce
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 0x7e1b29055af9fddd01f51e6a82a6c709b619dfa17ab157f4b245831a88d32d32. 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/ae99eb88-8a45-46e1-9ae3-2b30bba31a84.json and https://artists.proofprofile.net/proofs/artist/ae99eb88-8a45-46e1-9ae3-2b30bba31a84.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 0x9ad9774529a64599481cd57df1a0e1899f403814be27376bb6d690742ee8c81b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/KRB472301023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8886b236d9a5bb788567e060638e91e56a8a255a9f1debd139303ae7be7c121. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRF152000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a73c105f566dfe567f111f5af67dc3579d474450318f3137872290f461f287d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRF152000054.
Achoo (Feat. pH-1, HAON) (Prod. GroovyRoom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4e725064121a5987604a7fe5a45f2287774baa4844517a8e24c4fc1ef97fdf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA492001473.
The Roots (Feat. JUSTHIS) (Prod. GroovyRoom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78ea52f51d7e2d0c11eb07621d207dccd1ac66990ac56f679bd06ff97747e90. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRA492001475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd8e7c5ae71018696346d0257709193b3b8e7e93ee0f94cad381b8066ab42de. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRF152000055.
The Beauty of Void (Feat. Jessi, JUSTHIS) (Prod. GroovyRoom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06163a86627e24e5da62121b16683cb6da8b182626593403299b4733e9440fb0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRA492001567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049d3259df0aaeb3b0838fc580385d589cee453cb974e64fc07f6c309e92e1fd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRF152000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47d93e5fe71a7d0e9ff68c62a4ac66e410c5979a3663b7f0243c6f65815fe69. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRF152000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5531c06ed6740f4852abad72d04d0221da500ec7cb5f1492b8d98f4506ee587. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA492001477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaafd3d871372e773c31bda516bb489fc722cf676a61f07cfd69f590de4e237. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRA492001571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e589628c719b5e840ded748863bfe8ee00e1295e2e466c5053aeb80886d6d4e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KRA492001585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd7a1a27754ed05d74be35481c8f0700749a7fdf1ac0d875c965dc47e361776. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KRA492001591.
The Roots (Prod. GroovyRoom) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd466a3fb8c4b2e3d97595407bb46379bfa23dcac61932f1c2da481bdb9b8358. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRA492001593.
The Beauty of Void (Prod. GroovyRoom) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757bcba9b9e16e77f753164e3ff8e817c5a7cf35a78ce4d55a945f3f2c9e4ca2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KRA492001609.