Derrick Hoh Wei Jian (born 17 September 1985) is a Singaporean singer and songwriter who is active in the Chinese Mandopop scene. He gained nationwide recognition after emerging as the second runner u
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 0x123f4cde13a889195d0a570192926a1ee32cec760da93960df8b1e6c7107e189. 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/c787c0ca-6dfd-452f-a18e-31cffeab4873.json and https://artists.proofprofile.net/proofs/artist/c787c0ca-6dfd-452f-a18e-31cffeab4873.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 0x41a54e27163281c428fd6b3b30dfa29762c8457d01788338438d293fb06cd8d2. 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/SGA781500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d66ad5e4ce9af4cf836baecd40ee4fa7f7f9ae82641fdc4a361887d6a46f75. 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/SGA781500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2de6e0cc99d862920f674463ab94907ab7866ab8f0cf7cebc0128c810ef755b. 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/SGA781500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9785bf1c2c78fe42c18d018ee70c5ad9e52eb42c73a0571e8261b987574e5c2a. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:44:17Z), 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/SGA781200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9890a69de680a5af1cbd0d18faa32e3c7f8cc6e00a421bf8803bd45bb3b1182. 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/SGA781400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb91f74ee585dfc2d063bad86dd76f7363f74a133e14c705faa8e89a1d8ba354. 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/SGA051000718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd709433286f38da65f7d4d0031f37faa1bf258788b2abfe83ceb522c6c9e5e. 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/SGA051000720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbb22e75cd1afb29a4e66d8efdb304ec2213c8838239a087add8a127560d932. 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/SGA051000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc204051408e364ae74b59944a43874215c776ddfd1fd726d5d07942529fedc. 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/SGA051000723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbb22e75cd1afb29a4e66d8efdb304ec2213c8838239a087add8a127560d932. 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/SGA051000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5063a70bbacf2d2c7bd8b06339d9117174f4560242058908f9b9f4011f0edc57. 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/SGA050800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe81fffc61aad08a656019ad9d2b3eff25f924843de0249c2b7d968580b7fe1. 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/SGA050800308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dfce2795801d2f3d3387520fa8c685cbe356f6d0c9f7bb81fe0639a1fc1cbb. 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/SGA050800303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc073c395e65d555cb064cf7ebb68bf9a1360e5d8fc4a1a9dc6b0b81ae8ffed1. 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/SGA050800304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bd2e0264412a9987e3fdf35cbfc0baa82be91a2849f68b4634c6c78a2f7e6c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SGA050800311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b71b77a0b3fac2582b566ced635815ccc82a2192ee23be7f1665b852cf2b81. 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/SGA050800314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8857704eae17a07c02769ec9ac5d21ba9fde33950a6ed244506df85d7b31f5a2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TWCG52099920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29717740c1299105d8d1ca18495c17e3dd58f09c35bff9655ab143b7b7034faf. 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/TWCG52099986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de26ccf14c70adcb5cd11cd8363e7a590434fa86d0eafcc956fadd7eb122432. 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/SGA781800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ffad7986c2de64ea97780ec7ff30c1f5cdaa2d7412b6935c86d39d053e35b2. 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/SGA781700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56182e431d8c6224adce55cfe58abefde32fa6a3b35adebbfb2ce5c57166ae60. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SGA781700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc061f7898a18d0788a96e319d40bde3e23a53bca8255ebc0656a20b91e1dd547. 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/SGA051100436.