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 0x9f08d85d57d23cc6055b5d122b15eb5d889671602d6e1aee7b3955e061300894. 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/165faf60-18e5-4412-bfa0-3753863afc85.json and https://artists.proofprofile.net/proofs/artist/165faf60-18e5-4412-bfa0-3753863afc85.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 0x0d744e7c2ec4d4da6bc3d5f00092f721224220a2e766dac491b04c6e67682856. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/VNA0M1844777.
Liên Khúc Remix Mới Nhất Của Saka Trương Tuyền
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd7e121087506c38c649a0b8d47475a2ee3680bbc3eff213a2c61ba8ffe48f9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/VNR011042224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e708217b804c40c3a2e5505d4ab62bfaa06957bbbeb513f6e4535b02745bc9. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/VNA0M1844751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50e7e6e7c1cec9278afb9b159e046abfc22aebdcba75e418cbe49cec7e3087a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/VNA0M1844756.
Mười Ngón Tay Tình Yêu (Chuyện Tình Saka Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbad2e76557053f135ddc4750fb2212433d9d5fd32670237f6e366fb1f13d54. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/VNA0M1844757.
Như Một Giấc Mơ (Chuyện Tình Saka Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cfec7c43ca608709342c76c27c9402042d788f38753ec601a51f50c7bbb18f. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/VNA0M1844760.
Vết Thương Trong Em (Chuyện Tình Saka Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ffb4352b89d901bfc0c3dbbfda706711af818c51d73c99500996826dc89e67. 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/VNA0M1844762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ed00cbedda49500ec2d137b36ec5971046d4984beb956e71eba6736fb32500. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW1896410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3c628e15ce03b80a03866b991bc85e2e5f22db1b1f591f78c0b19ea40bf589. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4TW1896435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f79fdf57741e8acb78a32732bb25df0a59b3579fdcc3dca67397d39d59e4ffe. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/VNA0M1844823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e1386311761612432c715a6b8b5ef72be1197920189092c068e585395fe06b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/VNA0M1844888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bacc51d3dc3de97e1e0a62ef438daf4c3a881f4f8494dcea17745b46e78905. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/VNA0M1844892.
Tuyển Tập Bài Hát Hit Của Saka Trương Tuyền
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1371d00c0535f9056184b41825e349f6a572cf3b2be91785f4c260d838653e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMFMG2353525.
Mây Trắng Cần Gió Em Cần Anh (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce28c9031436274493c070e3bc138263aac974501ea1dbb3af6d85889feada40. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM4TW2420103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac0db762756f946721eee0e3f4d2e6a5adbf1b4b81b546db64baa81c9bfc67e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6MZ2448730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf8f6fee79ceb748ac3edd17fa06f5bc17caad295a7093be5d60b241c7a3471. 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/VNA0F2326097.
Saka Trương Tuyền Với Bản Lofi Tâm Trạng
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b62ce649381456581d47a5ad4869a8ad15b9a062b0f8bda535fffbd3a51c1b. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/VNA0F2326101.
Saka Trương Tuyền Với Bản Bolero Trữ Tình
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0574d6d56fb9c1c16f3cca1ab3a1aab6644ef987d4c640ca02d5fa3bd3a16f1. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/VNA0F2329855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38153bdb053e5c372658ec8e3390bb9cb1a450c94a94d0185d502bacd24786e6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QMDA62453192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebb7348eeed9ddc14d5cf1b6101e6d1ad720ce6d85718bc9ba4b1f1edb598df. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DGA052068228.
Tình Yêu Bất Diệt (feat. Hồ Việt Trung) [Remix]
Tình Yêu Bất Diệt (feat. Hồ Việt Trung) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255d78dd1dd57a2cb1d3be7d8d52b5033043e86e36886a6160199cfe151814f2. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/US38Y2529604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ee796fc6adc8bd51d6360d5b9ee7ff2ac18c4fbdbcfff4cc1b150b7b35ef5d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/US38Y2534578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd98c541a7a0134a74aa3e312dc3d52d95051d91db46ef860a264ffc0d5680c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US38Y2536704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c72ffe3535497a3d568688bafd628d07c37fa34415f7dcbbc9967942e58aa0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/VNA0F2500709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81074e25a79cbd8ea52a6301150f2dfb937fc3c11ffb46241898006146187824. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QMBZ92524231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdf2f602c09d5c478f7d220f8f4bde82c6a77caa78806bac66407d047d2d345. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/VNA0F2505394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56f6c775c9e3bcbebc7f39bc50ed4c2c0ec94e6e0d5e4d6b48b621184819dfa. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMFME2527060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffca61f72c0abe85ff6a404838e37d4d689b8d7b3a77237a44a12447115b5254. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/VNA0F2509883.