Keung To (Chinese: ; born 30 April 1999) is a Hong Kong singer, actor, and a member of the Hong Kong boy band group Mirror. He rose to fame after winning ViuTV's reality talent competition Good Night
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa3ab74e40338ee8ad98602244977f179359f20ca80b34f971b123b85356b12. 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/284e24e6-d5b8-4290-9b3a-4da5ea9badba.json and https://artists.proofprofile.net/proofs/artist/284e24e6-d5b8-4290-9b3a-4da5ea9badba.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593e7e3aa91203561792b7dad35fce485de861b3722ce28d7fb1c38d2f3e1e19. 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/HKG482010455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc30d9882a210fe524105fcf8a9df996756e3d600e521bd12ea4b2b275b9fcdc. 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/HKG482110495.
愛不作聲（電視劇超感應學園片尾曲）
風雨不改 (電影《阿媽有咗第二個》主題曲)
無人不知的戰果 (ViuTV劇集: 季前賽主題曲)
I Need You In My Li(f)e (ViuTV劇集 「無用的謊言」主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6683f6eefc98d132623a797fa1798ea7393cef8780b8f6a84d40e52cc336646d. 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/HKG481810351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293173c6fec27ba29ff389950dafbdde59cb28f01cc92dade5719eed026a88ac. 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/HKG482010445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593e7e3aa91203561792b7dad35fce485de861b3722ce28d7fb1c38d2f3e1e19. 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/HKG482010455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12d94628e95677f1c8ec408c5506787b815bd2248db2b8d2f5e6c30d2ee3eac. 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/HKUM72100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fecc2475dec79e7aa71fde97d31774e5bd41caa4113a3ff3cd0379d955abfd. 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/HKUM72300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16c56c898990569b6355f582d9872688719fac035ebbdac05d89d67da16e3fb. 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/HKG482210675.