Eason Chan Yick-shun (; born 27 July 1974) is a Hong Kong singer and actor. He is one of the most popular and influential singers in both Cantopop and Mandopop. Besides holding the record for winning
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 0x89731951c31e458692be6e447b7a26fb23b5212df38136b7eac9c4bb47e8d5bc. 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/c63ff441-8f20-43e6-a515-c803d19a0c9f.json and https://artists.proofprofile.net/proofs/artist/c63ff441-8f20-43e6-a515-c803d19a0c9f.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 0x6efe6ee15056bb7349d79f5e6689d3f44c0070b553c1ddefe7d7e92523d724db. 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/HKG070510005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3136a831058a08e23fc4d63783d2dea65a83079e510826b02299bcc30837df. 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/HKH090112513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4c47c13a21c4308b50ce06f61d31a4b460503a79b3cc85e9c65810a0205578. 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/HKUM70600363.
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 0x4757cfa521492117d8fdb4f9fdcae19b9612fcc24c27fa4c0ca56330093b4d8f. 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/HKG070510013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f86bddd319eb871b1cb3fd47000d5d59dc857b4f2cf39be8af93316b2c5a9bf. 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/HKUM70900209.
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 0xc4c1ad9ad93340f2b701b4da08cd63ca113c1261313fadc84f851f3b4db67780. 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/HKD250216601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fcf9c5056414cb5886a0a2f85b088cc9918f1278702c0dd3c705ea0783e8d7. 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/HKD250215903.
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 0x7bb82e7794032811776351f896778c566ae11f2cc7640c1591e0e718ede6e3ec. 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/HKUM70900204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64519a07582d477d869a1f0fd8f810f84e0e2cd5a6578b33daec7bfccb844fa. 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/HKG732124558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad66f45a5e38dff61d7e68888e201d0cffb719f87a5d7c54b7227ad782ff37ff. 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/HKUM70900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4b1141fcb193d275abcffbdb0070733fd6d5a38461baf1ee562a09d176c4f8. 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/HKG732280247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cbd2c7540b30f75a288adcd553b0e31d17ae4cc043b301efa5d208b51a7ef0. 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/HKUM70600431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b73dd188458568f749fd937fc193018ebbedbbdabe413fe7adbe6e2da8ae793. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:02:29Z), 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/HKE050030815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3787b5236699cc8c4e068aa01c0268812759ead1a1a871cd416d6be0203419. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/HKE460400114.
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 0xc99fa88a0b76b7a068d6a2afdc8cb8ceb299c3c9cc2cd88546027a81f205e6ae. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKH090010601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b0bcd0042a74e2215dce20306664f47b48bda5a1be5d5519a0773c3d559d5b. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/HKUM70900213.