HotCha is a former Hong Kong cantopop trio group presented by Neway Star Entertainment. The members include Regen Cheung (張惠雅), Crystal Cheung (張紋嘉), and Winkie Lai (黎美言). The group debuted on April 4
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 0xc8d44670dc4337872db0cacf60ec8a6612be3448a93e0c41312e67d4233f48fa. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e1b6485-2e75-4591-bc7f-a72733fec827.json and https://artists.proofprofile.net/proofs/artist/6e1b6485-2e75-4591-bc7f-a72733fec827.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 0x6f533bbf8b50810dac82afe0431e24205a06f729c8293031e380e2acdc5a40eb. 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/HKI310912001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9785dc0576d2cae16a1425310407a455f524a3f68a82b71b1ae5d2911ae4fdf8. 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/HKI310912008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f74458dcd03c464dd2755f73c822a01f9b48098034e084b2dcdd2a8b38f0ea. 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/HKI310911002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d318a356946b78c3f20b369c685d375eedb744d5be56412ec5dd026093ffc8. 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/HKI310911005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa7face55d73e55addb122fd6107d99a3eb697bb7da1de0d8bde1ba2dffd1a2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKI310911007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f92de6714bb0e670444d6e0d8d6a9afc66f44b7e837aa2fffe3ef9018e55a65. 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/HKI310911009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b7c1a237383f4069a07b83ce95a43e30745c7f707587380bc3fab4494deebf. 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/HKI310911004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f23d64d9093495bd09af0e99de67f363b5d061b7b199e17920e2d728ad732bd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKI311217003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf478d6161a8492509014eb9114a5b3a771006b7ea542985a0fac464da62762b6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKI311217004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40aae9999fa2d2b0b1755700a7a9062f642ae63d7b910b383be8af81dbcc48d. 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/HKI311217006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b239652039b2642e65de787fe844d368f0ab3e808c087938b473ebf7bbf1c99. 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/HKI311013001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c192d4fb146cc94bca036b7d14870e4d2afbb267978e6c692a821d8cc9802f7. 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/HKI311013003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0946d30928bf3406e4debc0293c418a303444e1d55012983ee25702cdad16963. 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/HKI311013002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f030fcbd8957edea9384035ad81c97d46782f26ce75ab31b6cc8b397762d1a1. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/HKI310908001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f74458dcd03c464dd2755f73c822a01f9b48098034e084b2dcdd2a8b38f0ea. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI310911002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1d7900795113a411a17fa9ec56d9aa8ef093df72a3765ef0fa9fa7a5d79dfc. 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/HKI310806002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d318a356946b78c3f20b369c685d375eedb744d5be56412ec5dd026093ffc8. 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/HKI310911005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517a5c9e2bd7fe75568d021bc798acfd4f6a75f648b9aa0fc5edf9b816a7b635. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI310806001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5624c5a5fedb19bf4699b6b2a01c984d58b1f8f29a3b57773ffef40c8c56e0e5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKI310703002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba03df61b856ec70047cdca94abce718c3b7123e8c863171d72db2e2ccf99035. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKI310806003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbdebab6d891554641b1b8c28c7182fe1942149a7807e219f1a473e6982f30c. 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/HKI310703005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f030fcbd8957edea9384035ad81c97d46782f26ce75ab31b6cc8b397762d1a1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKI310908001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5169e9649560ae08824b11ae8843a6db79497b833749c382dd69c3b9a8857347. 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/HKI310908002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517a5c9e2bd7fe75568d021bc798acfd4f6a75f648b9aa0fc5edf9b816a7b635. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKI310806001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba03df61b856ec70047cdca94abce718c3b7123e8c863171d72db2e2ccf99035. 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/HKI310806003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6666e649f8f7f8e2293cff714c205153eef747c48b203477467cdd777d0eea98. 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/HKI310806005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2055509bb041f9afb53a33de7954cafd96dd56dd5253dca5cbdd5631a81677. 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/HKG780801129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5624c5a5fedb19bf4699b6b2a01c984d58b1f8f29a3b57773ffef40c8c56e0e5. 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/HKI310703002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d14b3107bf807229d1ff3e075512621d690ab594955cf9c364bc275530d688d. 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/HKI310703004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbdebab6d891554641b1b8c28c7182fe1942149a7807e219f1a473e6982f30c. 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/HKI310703005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5624c5a5fedb19bf4699b6b2a01c984d58b1f8f29a3b57773ffef40c8c56e0e5. 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/HKI310703002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d14b3107bf807229d1ff3e075512621d690ab594955cf9c364bc275530d688d. 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/HKI310703004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbdebab6d891554641b1b8c28c7182fe1942149a7807e219f1a473e6982f30c. 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/HKI310703005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac20dd828f4e365e63b12f12bc44b351a7038650e2d078d0bcac2d3d076c6c5b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USDHM2206526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d21882f12d64d3af883bd65fa5c4a58416694703311d007fdba48b8cbeaf4a. 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/HKA271800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8b971da01a7e413877531b530c5845ec090af76eecd4c506fb8cbcbeb17969. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI311426001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85c0eb4d3a65010950993b25bce087c9ccdd40751cb0125552cf67d0f0eff2c. 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/HKI311116002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf99bf90bc79af33d811e13dece6ce6ee672d516f59f6fe40d16588d9ef3ce7e. 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/HKI311116003.