1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x299a8b496b41560d814a0d01d9febf66cd4b14643799ce6daf381779835bed2b. 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/bbbb3a3f-63c5-4a00-8905-170a0b48cf2b.json and https://artists.proofprofile.net/proofs/artist/bbbb3a3f-63c5-4a00-8905-170a0b48cf2b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x1857a0eeb8184ea0d91e45ec0145fd5d30af5f0da505ebe16aba82e17bff7b92","isrc":"ARC572406963","name":"Cô Dâu Của người Ta - Remix","registered_at":"2026-06-10T04:41:36Z","spotify_id":"32PNy57535brz1GP7v6RC8","type":"track"}
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1857a0eeb8184ea0d91e45ec0145fd5d30af5f0da505ebe16aba82e17bff7b92. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/32PNy57535brz1GP7v6RC8.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/32PNy57535brz1GP7v6RC8.
{"copyright_id":"0xec646b5d8ed2b9459e4803d6d90fa8858e05ec496e83e8905c1cf7c0d9b56996","isrc":"US38Y2517983","name":"Đừng Lo Còn Anh Nữa Mà - Lofi","registered_at":"2026-06-22T03:14:49Z","spotify_id":"5xbw2uwPliiYrqSzDpH2lj","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec646b5d8ed2b9459e4803d6d90fa8858e05ec496e83e8905c1cf7c0d9b56996. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5xbw2uwPliiYrqSzDpH2lj.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5xbw2uwPliiYrqSzDpH2lj.
{"copyright_id":"0x0d548d4aba59ae6f292978525d58d59dcac94d36f4eed2d0fe6d726f23fa9ac2","isrc":"US38Y2517985","name":"Cô Dâu Của Người Ta 2 - Lofi","registered_at":"2026-06-20T07:28:39Z","spotify_id":"207zbFR9UpkS5WfF98E6JI","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d548d4aba59ae6f292978525d58d59dcac94d36f4eed2d0fe6d726f23fa9ac2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/207zbFR9UpkS5WfF98E6JI.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/207zbFR9UpkS5WfF98E6JI.
Lỡ Duyên Kiếp Này Liệu Có Kiếp Sau (Vinahouse Beat)
Lỡ Duyên Kiếp Này Liệu Có Kiếp Sau - Vinahouse Beat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea449918347387605299a70a296e8684fa6510b5dc0201fabe37f23be457c55. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7IxLF6NgXPySZ1H6Lue6kW.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7IxLF6NgXPySZ1H6Lue6kW.
Từ Nay Em Sẽ Là Vợ Anh (SS x AM x LUNY Remix)
Từ Nay Em Sẽ Là Vợ Anh - SS x AM x LUNY Remix
{"copyright_id":"0x09c044877658a2131d974cf6d335f7363c94e65a287e02f08be5ccb00d8791a9","isrc":"US38Y2500871","name":"Từ Nay Em Sẽ Là Vợ Anh - SS x AM x LUNY Remix","registered_at":"2026-06-19T12:42:43Z","spotify_id":"3NKhXUwjq9fNe70heAxmsL","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c044877658a2131d974cf6d335f7363c94e65a287e02f08be5ccb00d8791a9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3NKhXUwjq9fNe70heAxmsL.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3NKhXUwjq9fNe70heAxmsL.
Từ Nay Em Sẽ Là Vợ Anh - Beat SS x AM x LUNY
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44ee47512f93d1d3a8fd8300c06ce879b57a595e36c0e67a22a6cc662458922. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/12qKhgsU3wtGnGpx1ra9dT.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/12qKhgsU3wtGnGpx1ra9dT.
{"copyright_id":"0xc91d4ed815ef9db1cdb5ab55171f05e4620a6eefb8462c2e6ce1a48c212bc81c","isrc":"VNA1M2402047","name":"Nước Mắt Muộn Màng - Vinahouse","registered_at":"2026-06-06T17:49:13Z","spotify_id":"5wK8H62x9W6Co8YmOXlcui","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91d4ed815ef9db1cdb5ab55171f05e4620a6eefb8462c2e6ce1a48c212bc81c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5wK8H62x9W6Co8YmOXlcui.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5wK8H62x9W6Co8YmOXlcui.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7181fedcee54629a9d81bcbeb751260c69964312632d26ab0036c2f583f1a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5tT6OQm7JSFHSS0AMSIE6R.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5tT6OQm7JSFHSS0AMSIE6R.
{"copyright_id":"0xc9e58bf6f113c73dddac5c76f9a47ed3922a933c41d64323cbebc6df79505e34","isrc":"VNA1M2401736","name":"Nước Mắt Muộn Màng (Remix) [Version 2]","registered_at":"2026-06-04T15:39:48Z","spotify_id":"7IiDXTeRal64YWnIhAcGJk","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e58bf6f113c73dddac5c76f9a47ed3922a933c41d64323cbebc6df79505e34. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7IiDXTeRal64YWnIhAcGJk.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7IiDXTeRal64YWnIhAcGJk.
{"copyright_id":"0xe6c805caea6e212d1c22e892aca7b328921ab19809fefd2d1d0eded979de725b","isrc":"US38Y2434090","name":"Anh Cũng Biết Đau - Remix","registered_at":"2026-06-11T11:49:20Z","spotify_id":"101H71itikK8UP8oDufwnd","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c805caea6e212d1c22e892aca7b328921ab19809fefd2d1d0eded979de725b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/101H71itikK8UP8oDufwnd.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/101H71itikK8UP8oDufwnd.
{"copyright_id":"0xc9d5743f3928d6b2634353c9c53a9214c0b768182ad0a6a08b827e7665fab759","isrc":"ARC572407182","name":"Cô Dâu Của người Ta - Lofi Speed Up","registered_at":"2026-06-06T11:10:34Z","spotify_id":"6VtDvkohJJV5kpukeZsxT4","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d5743f3928d6b2634353c9c53a9214c0b768182ad0a6a08b827e7665fab759. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6VtDvkohJJV5kpukeZsxT4.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6VtDvkohJJV5kpukeZsxT4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3808377292258a46e62daa92b6bd45c432c5d6619828a364334f7342ab5710f6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2IHuqodZz9FMZtKFBoO1pk.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2IHuqodZz9FMZtKFBoO1pk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8894aa9a060534075998d12c1252a2a1d387c7367dd677de1a161725c5c21e35. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5Aojt8SaP79BXFwyvUovyx.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5Aojt8SaP79BXFwyvUovyx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9483f69ddef331757298fd618a7138732121e28edb901a4656464355601d9de4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2nR6vika3e1lAWM2LAz2kO.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2nR6vika3e1lAWM2LAz2kO.
{"copyright_id":"0xfc2c5a359fbf98eb929b7fbd49caadb941f3e33301d77e01505b7fa03d883b4b","isrc":"VNA0F2400247","name":"Nặng Tình Remix","registered_at":"2026-06-24T14:52:36Z","spotify_id":"1xKMeWMAdsejoWwBkkSYHD","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2c5a359fbf98eb929b7fbd49caadb941f3e33301d77e01505b7fa03d883b4b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1xKMeWMAdsejoWwBkkSYHD.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1xKMeWMAdsejoWwBkkSYHD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fd4c226299be00a7912e7a81e9a728d3225bf0499d3f89e28be34baaa062de. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2WypzNT8r1XWeMMlmzN1kH.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2WypzNT8r1XWeMMlmzN1kH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fe2c7aa31b39feca425a021564a4e4ec024acb29764220c8229f28d7b97669. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4Fm33aWSRySDd1wlcnvPog.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4Fm33aWSRySDd1wlcnvPog.
{"copyright_id":"0xe0496e7da5a3c4cb7748fe0a35618d705f7215e05e6b5df74527fca682e2827e","isrc":"QZYHM2372480","name":"Hẹn Kiếp Sau Remix (Vinahouse)","registered_at":"2026-06-20T07:32:54Z","spotify_id":"6uyYsDrmioAyMj77TXsva3","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0496e7da5a3c4cb7748fe0a35618d705f7215e05e6b5df74527fca682e2827e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6uyYsDrmioAyMj77TXsva3.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6uyYsDrmioAyMj77TXsva3.