Vũ Đức Thiện (born April 8, 1991), better known by his stage names Rhymastic or YC, is a Vietnamese rapper, singer, songwriter, and record producer. He is currently a member of SpaceSpeakers. Life an
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 0xe4d013389f19b6dce2a3df888f1c9dc8fc992bb464e347b861c436b7f76ccd02. 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/02ea67d9-1918-427b-a85d-59d5a8bf07d2.json and https://artists.proofprofile.net/proofs/artist/02ea67d9-1918-427b-a85d-59d5a8bf07d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ĐÂY LÀ RAP VIỆT 2 (feat. Rhymastic, Wowy, LK, Karik, JustaTee, Binz)
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 0x6bf6822da5c558e2e92ff62d38c8840d9c6e05a7f88b9c48a9b6c435bd3b4a93. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/VNA112100194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61908222f23d50e1f062fb3b055b89ea1f68d2b8581066792cb24028cdb3d87d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/VNR011032931.
Đây Là Rap Việt (feat. Binz, JustaTee, Rhymastic, Wowy, Karik & Suboi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32334ed35c34d2c2932cd8aa8f9bfa6b800036a962e3f39cb232b4dbfdcf6d4e. 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/VNA112000143.
Anh Chồng Quốc Dân Của Em (feat. Lăng LD & Rhymastic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5846c465d724f25d550db65979462c7ec33f80b5aeb735c140e594f134e1bc3. 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/VNA112000355.
HOAN HÔ (feat. Rhymastic, VSOUL & B-Wine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6cf7232211494033a6ca42dbd7b3aa20b4fe00ce421569bf1e8c87264d15ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/VNA112200066.
Lặng (Live Concert SKYNote - Đà Lạt) [feat. Rhymastic]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb019b72d53064b5afaf024441b1ad4572fd162f0480c0df4ac2ceb7c324bf49d. 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/VNA0M1939748.