Eric Kwok Wai-leung (born 3 February 1974) is a Hong Kong Cantopop music producer, composer, singer, and actor. Life and career Eric Kwok was born on 3 February 1974, in Hong Kong. He moved to the 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 0x05ace425ed8523e8964e384e6a31e07331443431d15c174a17b70b3d17745ab2. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a845bfc-80dd-46b2-8801-f794fe218537.json and https://artists.proofprofile.net/proofs/artist/9a845bfc-80dd-46b2-8801-f794fe218537.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 0xba90eaf33c55805c3d7c647bc711231f35469a6f313dd2ec74dfb6034c66f752. 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/HKUM71400320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0cfff999b4a5fd8c914d260bbb72914eb55889ae59d9048bdf66da204481aa. 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/HKUM70801425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ec3917961ba6981038e01ed0d7febb231770d6f9f0b362361b3c71892c7508. 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/HKUM71400477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49e8b952cbbc44443a636b9f2319e12f6de90302fe41f916350778b00072b3e. 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/HKUM70801432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9acc4b238839935ceb2007101493cdce43408991a50e33e6365d24e289bdea. 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/HKUM70701746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bcd6e5a02db1c5da1e76b568f8ffea5123d6978fd88d7230ea6124b924da4a. 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/HKUM71300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772f8d5c25111e4ba7074faad3d2c20684bd69b10ba9e357eb6d24b169babcd6. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/HKUM70704054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd466c1d5bf17ac00f26587fe72a0931041bf04575e4b375413b449134e4e6d3. 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/HKUM71300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5eb3b00740bae2ca6874d48153d87a5548a52a619b2e944d4be9472193e179. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/HKG070610002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fc0d7da1d41fff063404ea5a54e0af444ca6453cbb51a40a909798d651ae1c. 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/HKG070610006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573b16b0ec79aacd4d1b4785c3044759d4434e8b24bb005827c707b192f87d1a. 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/HKJ631201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0408226d45c08c37e257575c532d82a5aa6e29e636c32f505b87e55892452b. 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/HKJ631201004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb3b656b4f20eb17a7d23c90c42fe3852673fe534970426d7cd7b68e1e0be46. 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/HKUM71100535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c82c4ab8202bcbe7bdf8f6f88731c648d5b68e92ab1c3bc892c39dedac21110. 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/HKUM71100212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b8dc7ffd2a6db7e6ca97359dd3b92e49a12fabd81e2fcf60e9565b71ce599c. 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/TWA550217110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7035a07197541ae38d12cf83689fcd78f1ab72d3e4d771294e2a4a5201948efd. 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/HKUM70900603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1b2feae3748bc63da66fe2c0ceea6e9b92c23220cb9b49579ad3b98a421693. 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/HKB820000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537746698971d5c0ccaa0f05854babfb00728086c460dc0f597063f42d373565. 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/HKC339900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e6873b9f685ec6e022db2c4c40aaae96642b19ab537593a6e84110fcb4a4f6. 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/HKUM71600857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b57e8332468011b889fda17f31fca494ec536cb20b9f96b7e7c8ffbf51bfb1. 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/HKUM72200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b57e8332468011b889fda17f31fca494ec536cb20b9f96b7e7c8ffbf51bfb1. 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/HKUM72200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc595eb8c7ad58f092e57bfb3469b0cfb9b3f82ca449ab836858a891b9dfe7541. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:01:04Z), 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/HKUM72200588.
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