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 0x497dbe1437a1be757234cca03b1edd635b40a65979c3ed4b36ff1da1c64558a5. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a56a673-2684-4fb8-972d-3b79eaca76ab.json and https://artists.proofprofile.net/proofs/artist/6a56a673-2684-4fb8-972d-3b79eaca76ab.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Chỉ Riêng Mình Ta (feat. Nguyễn Đình Vũ) - Remix
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 0xcb6e5a453c4f9ccb4f99d7b462efbb161fe89771c16dfcf5812166b9b610b250. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0M1904602 — a six-check JSON result.
Hey Mambo (feat. Nguyễn Đình Vũ) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7e0eaa5b6a430ec3f447856610f0e0a2dbc267dcaf0258526a2bc5e6ef692c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0M1904612 — a six-check JSON result.
Có Bình Yên Nào Không Xót Xa, Có Tình Yêu Nào Giữa Chúng Ta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dfcb26b70844d5fae857f696008f86c468ba39ddf09ceb587ed64ba3e16760. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2470060 — a six-check JSON result.
Tìm Đâu Ra Người Để Thương (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b81963d35cd58f54d5533f72fe093b38e2f409d15e9f7d0291be4572bd36dd2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWBE2244276 — a six-check JSON result.
Những Ca Khúc Nhạc Trẻ Remix Hay Nhất Của Lý Tuấn Kiệt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427405860d02450dda8a9eb035f4730fd0e43a2f714318b5bebe3c208bbf0814. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA052376121 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb561883c07726b3f3829c43ce70bc592d94b559ecd4a2375729f5214132578d1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZYHM2409515 — a six-check JSON result.
Bỏ Lại Thương Nhưng Vướng Thì Đau (NhacPro Remix)
Bỏ Lại Thương Nhưng Vướng Thì Đau (NhacPro, BiBo Remix)
Bên Anh Em Sẽ Không Có Tương Lai (Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6387d192dba8c98e78b9f6661b2609fcec535a23e641f95f5703734774807c3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA1M2402079 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9912d01423a9626ed82a903d2f7904e43c7af34d3321e49a270fa9a74a858300. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA1M2404482 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7351b14c573f360f05d19524fda42072d981ab16c8566d4fff572fbc4b18fdc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA1M2405053 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20be3e4045a3a65490e094b9c2a97a5f6db09ce7a361c626f32a8b9c52a216b7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX762575405 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e62dcd6e3a9dde6ca518b11c807f41ed9088c7b10cb50c589e60a329213100. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX762575377 — a six-check JSON result.
Medley: Bao Giờ Kết Hôn / Muốn Cua Anh Làm Bồ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae47db7ff4a2f4c70d59efcaf30783037f4ea28f71e97d43629adaa0ef222e7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA1M2406146 — a six-check JSON result.