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 0xefc178f33c494483649c2993846662203798a28773072cb77f9209ca7a3492d6. 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/429e4259-ecc6-4aa2-a2c4-d752a5016d5f.json and https://artists.proofprofile.net/proofs/artist/429e4259-ecc6-4aa2-a2c4-d752a5016d5f.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 0x658b2095ad435328c42c738fa299ac555225508291b3609f95d6baf04c6bd6f3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/VNR011057047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdb88b6f40602f07b19619048068bfd2509be278a0cfe406121c9db52ba0693. 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/VNA0M1908376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb985ae59f62bf97b4707ebcabddce4631df9873c311581932f52f42475dd1a5. 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/VNA0M1926772.
Tìm Được Nhau Khó Thế Nào (Theme Song From ''Chìa Khóa Trăm Tỷ")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4672bec224e78c4a3f0e46cfc0c552667aec3c7e7070ebac07c34cdcf2fc3a8. 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/VNA0M1926946.
Cha Và Con (Theme Song From "Dân Chơi Không Sợ Con Rơi")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d13af7cd9949c3a86a5f7b697452d4a242bbc36534dada8560776ca7f56e33f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/VNA0M1928028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe686a5377d552650572636b26f7578c155ed66d370eeaff3d0aa5c2d01cd452. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QMFMF2234547.
Nếu Ta Không May (feat. LyLy) [TiJak Remix]
Mất Nhau (Original Soundtrack From "Yêu Trước Ngày Cưới")
Mất Nhau - Original Soundtrack From "Yêu Trước Ngày Cưới"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28ca5ac93e96e5c3d90547f998136786966fb00be641adcfa5dcdfe6c67f0e2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DGA0R2317864.
Hoàng Hôn Nhớ (Hoa Vương Original Sound Track)
Hoàng Hôn Nhớ (Hoa Vương Original SoundTrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4048a7a8e40c904a260f05440438eb2251773b7e1a1c293572104bc32ec9811. 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/VNA0R2400033.
Nơi Ta Gọi Là Nhà (Cuộc Chiến Hạ Lưu Original Soundtrack)
Enjoy Cái Moment Này (feat. Tez, Anh Tú, Vũ Thảo My & Nhựt Trường)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82a6afa0abfbf114c98636b24c79078d25beaacf399d39a8f6b5d1cb8c7202f. 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/US38Y2417296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c1ccd85601cf81b49364e1028bad52861e40631776f322cc35eb7496b7bb2e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZYHM2407076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c7084e16e8b2bb2595cc31ffd64848d28d017a5d03e5d4572a8f919657ab24. 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/HKK972401019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd5da72ad5d89c072fa1c710f260d75fa345834e838988a3eaaabf51935d49e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/VNA0F2409297.
Có Không Giữ Mất Rồi Buồn (feat. DT & Anh Tú)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eebaf4a58aa81a13825d1f623576feb2e85c337997f04a6be9eb34576ab1609. 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/US39N2306136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895d0b76ca83d034efb2cea11f1604a19b398855419bb69f76879efc70ea98bc. 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/US39N2306137.
NÀNG (feat. Ogenus, Anh Tú & Đặng Thái Bình)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c625feb1ed6d8cb7252a4e2cf0a6545cb9a38f48e041d9e20479eb6c555cc4. 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/US39N2306708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5868dcbd149a508c0e72d63958984e5529707178babf1dfa432bca7a889843. 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/US39N2306709.
Đất Và Lửa (feat. Long Nón Lá, Anh Tú & EVY)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d7a219afef7fc5ee96793933db6db3dc49e020417dd322baf1c6d7974fffa7. 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/US39N2307747.
Trân Trọng Tiểu Tiết (feat. Wolf C & Anh Tú)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea6297a3fd086ebc78419df48c78421a857c2a8a097c4d2c3eb99733e8148b7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US39N2307752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e197921d3a8c9130c95d1173f836ef31cff5f4e7254f7345de4466daaf98f6. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US39N2308503.
Thích em từ đêm hôm qua (feat. Hydra & Anh Tú)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9732955bf8e97413c3d975d5d2a1fb93cbde9df133c0ac03c12f0a0be181f931. 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/US39N2308507.
Cậu Ba Lục Bình (feat. Snoop Dee, Anh Tú, Vũ Thảo My & EVY)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ab80a5e7230a705a43cdf95e2f2866774eb4574fb1313d9c1658c55d1d9405. 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/US39N2308947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0d7e2e364cac6e396b2f5c9b2a732efafe1f12347781d2dbaed49ea76ce22c. 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/VNA0R2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78bae9c8d20fb14c0a9037dd216b68d05767b196247c5d2753a3857480ec325. 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/VNA0R2400043.
Enjoy Cái Moment Này (feat. Tez, Anh Tú & Vũ Thảo My)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38220e00ededcf6d42762f5193a05438d1cece750147b4090106ed0e705baba0. 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/US39N2312119.