Trọng Tấn is a Vietnamese singer and vocal music lecturer from Thanh Hóa. He specializes in traditional Vietnamese music and Vietnamese Red music. Trọng Tấn started participating in arts performance
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 0x0a5defbb9e277ec3ae8d1deea245e2ad8aff5f1b56de8ad7933fad24470a7e3a. 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/e81149d5-a4ef-4c09-8658-22171d308525.json and https://artists.proofprofile.net/proofs/artist/e81149d5-a4ef-4c09-8658-22171d308525.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 0x4625b62a781b8009b45f57c0c142c24c539b394cbad8ef8212afbec5dcefd8e3. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/VNA0F1715862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1fce51aa127011d49cdbb58cb9ba0ab46943dff49f3c4ac6eec6b4ba4a4cd2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/VNA0F1715863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b028304d4e04b87af698c462a8e1e196874eb810d359b30d61695bc7b42700c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/VNA0F1715867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaa0707588901ac957fcb774a06a45ba374a8edb06cb2b5e95fcc2f16fe1701. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/VNA0F1715868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8877d0aeeafa20e53e16f9782dd80807fb76245113bafbe41ac80f0a500824b1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/VNA0F1707178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10738a15c99e087477d6a45903f6cdbdc0e2da7268040ab98157dbbd08c9928. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:19:26Z), 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/VNA0F1707208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ccff463df7bfc289234a5f207b4d3b984fc68ee916758dcd653bede12b137e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/VNA0F1707058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d2a5bd6662240cbee5593a365e91b07af36375b3e40a93f96ae1df0cccb677. 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/VNA0F1707059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4dd0d7ed73b01d244b76c0e5bd41d575b1f532fa7c516292dda31935e96d1d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/VNA0F1707041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dab20309a8e60e6476d03cbe7a90eb9c590530f753590d912320779ad4399ec. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/VNA0F1707042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d27b3448f0bc0a77b956123ed0d20d9c36c98bdb712c74c5cdc3846639302ff. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/VNA0F1707046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab360bee2360cca364a71fbd17a047c6e0097bd5cac51da10010fde8b752e77. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/VNA0F1707152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d949bb3df4a128506d0f068862c5047844b03f4a479f9e737ef883a5dc5e857. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:39:31Z), 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/VNA0F1797266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d22855ad4cc0d23f04054c800866241c77ff940199f44fbbfc74862573e6f0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VNA0F1707139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de494dfd3a72e8f3ff13ac96f0dbca3759efd86bb4410b54bc27e73b4f9f0d3. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T07:00:57Z), 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/VNA0F1707061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786ba6088543b295481d1b6ac186aff6684e96c8dae81c0218d7f458ab84f7a6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:47:18Z), 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/VNA0F1707067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963d5bef1f2d1ee138f5bd254b133d21716136a97dfbd818bb5df50bda949d08. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:04:11Z), 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/VNA0F1707071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff9920cc44e8bed3225c1a4f6634b998259b237b4d80fb4b6b626b5f9d899b6. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:52Z), 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/VNA0F1707228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3a85d420581a7d36d3fa55f6040ef69fca37b26a04afb0b4b1eee7ef25a14c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:47:49Z), 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/VNA0F1707084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac1bd8d24cf7338d0d21d498a3732eed82d1738985fb0f277ea9c8f8109a888. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/VNA0F1707086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c1f96f6aeab701f68c18ad77f2fee26f82337e9685f96dbe5b8dc32a6a666c. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:08:12Z), 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/VNA0F1707091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074955c475286b3b23e4e008d7601d9c19e67e6dcdeca62fb69116a7a1fee0f3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/VNA0F1707031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a21de0569527f1774e335508676c2d000ed6a64a105bb84991b52c067d3a5b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/VNA0F1707032.
Chuyện tình Kinh Bắc & Tình yêu trên dòng sông quan họ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777982fe0e35c01f1e2c67b9b1d4796efaeff994b498fdc26bc2cfe038093df4. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:01:56Z), 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/VNA0F1797230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3370545ba4a4b962be478a78327395113a05437fe4b1456320d86ce9c5531e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:08Z), 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/VNA0F1707095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fac47b8d99944203127d1b11d01291248cc2089fe885ede82e9c3f03b3507a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/VNA0F1707098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e66f7ec6b62dca4feb610760b45e4fd091fc12a5839fdaa463cc2d5f769e33. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/VNA0F1707163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc938fa7a2052a577f0b9e0a02615de03419672900496ea830b1653fe060605ef. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/VNA0F1707214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7c3f080150e14f2a80c2634e40d0db7ccb4e4d3e52cb3e40b49bee4cd6c8ad. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/VNA0F1797250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa565067d8b8fe83d2f27cc088a2bfe98e641105d954f14d7df9cb28244789e6c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:35Z), 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/VNA0F1797255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb97d5887adcd7bf0c8b2a7338c25eec6cc0e6ac9f9b28457dc4e702acf4d78. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/VNA0F1731010.
Trọng Tấn và Những khúc hát về Quê hương
Trọng Tấn - Những ca khúc về tình yêu đất nước
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefbb290ba82d08bd4b3be16bb758a45c3b09d325fabf77eafa3cdb518973a75. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/VNA0F1711861.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f0a2cde096020dfd915648ab18ee8cc80cd71e5de1bf22766397e5c986f089. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:08:34Z), 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/VNA0F2502443.