Hu Mengzhou (Chinese: 胡梦周, born January 11, 1989), professionally known as Corsak (stylized in all caps), is a Chinese singer, electronic music producer, and DJ. His debut single "Reverse" (with Ma Yi
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 0x63e8188bb2c1f28a4773e0e42390f5c16f75c62eb8a65df1ee7aaa05bfab0384. 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/399d324d-8c68-4821-b2e7-be96c0e0a110.json and https://artists.proofprofile.net/proofs/artist/399d324d-8c68-4821-b2e7-be96c0e0a110.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 0x1840a1be41f13e20b01cb591a847011ff4687f6cb6b2578044cee8f6c54c5651. 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/QM4TX2149469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d29ad3eb168232a79ea6b11333e6885f7b1c945a2c04815ae44520121efe96. 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/QM4TX2149525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee591e82a79c7a4829eb91c3f9a3363da31abdf62b515186da950d5bd408d550. 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/HKJ962115404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1840a1be41f13e20b01cb591a847011ff4687f6cb6b2578044cee8f6c54c5651. 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/QM4TX2149469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d29ad3eb168232a79ea6b11333e6885f7b1c945a2c04815ae44520121efe96. 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/QM4TX2149525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271d453a8026c66ccff4cc39f312a38a99fc0abe87f8f768f670358ed546ce30. 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/NOG841822010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9829efe4126348493859bab277da6d312618c4438f3d5ea267b2631f8f502c. 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/GBARL1900534.
Going Dumb (with Stray Kids) [Mike Williams Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c33fec6e447c76e82e30f0d7286faf4749358211a7e2450321cef05aba1f010. 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/HKJ962115406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5cddd437a51085c0810df18ada4a053ebd5c61b8525bdd0c35b5d14e1a8545. 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/QM6P41953807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e42767c551a97aa53bc6f93f9520de411f7f236aa7d7fdd2d9f3126b45c7fa8. 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/QM6P41931968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde81f89d408fc88736f3ebc4c2a90fa2a0a8c238190a54a5d5dad62b10f5d8e1. 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/QM6N21932048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7c7092c984241bf1ce1da2e5ff43ac068a68336b0113cf43396889a9ef80f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKJ962115440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a7bb3b3fffb375d74e2ef4c22520e84d5a8bf20a1436afa00d641ffd902177. 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/ZZOPM2104424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab592debb1ae248f2da709c0b3ebb1cca2a694a32a5e7b3f9522821dbdf85c24. 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/QM4TX2037761.
Take Me Back (RayRay & Stoltenhoff Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c43a4ef3ec91ea43e93b22d983d8ccf33787a954a4309d5b968f9ec16940ca5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TX2037762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fa170059abd02655a8922119995d73b8972b26625a6cb2246696a67a2d5f26. 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/QM4TX2037763.