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 0x5caf0bdbabf7638961f4a03ef225a6ad1ac0ad353642e58c597de3c7a04de0ac. 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/eace131e-ea89-4c87-9426-299b12d6da11.json and https://artists.proofprofile.net/proofs/artist/eace131e-ea89-4c87-9426-299b12d6da11.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x95fc280ee3f64085a191b98b59ea03cbfd8a22531a380601bb5a01a87ac127d4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA1M2291582 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7e79aaeac23bc5c54ce79af148166af033e883cf63081ae9595cdd2230f72e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZN882566467 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224c1483fff625345a0ef74d4611d2c5f2b457dd61b255109b403d563cb08893. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA1M2402056 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4572c9f3316e819dd46690dbb971e4a25c8caaaec927390f36e7c482a2bc68. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA1M2401926 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef6424263887081cd1d04f7576ae02bf47e5670f4987e620f9f3458cba92d48. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA1M2400667 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1eedd6cb68f10041d3262ce7734efa91765c6c97884a730c60e3c2651b13e61. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA1M2400412 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3ff1816364cb5fefd0a793bf260e5eb8091eca00186b5bc5f173f4bd14c0c0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA1M2292050 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d193196184de0d71917de979477994f01d34ba803f43cf22993f93b929eda4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA1M2291089 — a six-check JSON result.
Vì Một Người Con Gái Mà Chẳng Biết Đúng Sai Remix - Em Không Đúng Anh Sai Remix
Vì Một Người Con Gái Mà Chẳng Biết Đúng Sai - Em Không Đúng Anh Sai (Kvprox Remix)
Tất Cả Cũng Chỉ Là Là Một Sự Dối Trá Remix - Em Không Đúng Anh Sai (ChungQ Remix)
Trả Cho Em Remix - Anh Trả Cho Em Tự Do Tháng Năm Ta Từng Gắn Bó Remix (KENR Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590f5e013cdc3b6286e6e927edfd6e0c039d1dfcd19aa79f6097cb0671dc2eae. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZYHM2412857 — a six-check JSON result.
Trả Cho Em (Remix) - Anh Trả Cho Em Tự Do Tháng Năm Ta Từng Gắn Bó Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62aa2e67ab2c19ecfb4d2eafe89663233f7ab4604d8fad98bba331b3eb8f599. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZYHM2412855 — a six-check JSON result.
Mưa Ơi Mưa Đừng Rơi Remix - Trả Cho Em (MUS Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c573ac0fe35489ae75fac59471a0d5806d7160d70824afce5712be74fc55c86. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZYHM2412852 — a six-check JSON result.
Em Không Đúng Anh Sai Remix - Vì Một Người Con Gái Mà Chẳng Biết Đúng Sai (PhaKe Remix)
Em Không Đúng Anh Sai (Nhẹ Nhàng Rụng Tim Remix)
Anh Trả Cho Em Tự Do Tháng Năm Ta Từng Gắn Bó Remix - Trả Cho Em (TLee Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8cec619969c6a0a776698a7427e3ff49fa9c9dad1a4c19595d5e95d30c93cc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZYHM2412846 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc123f3142c9b6182957c5fcbb6554ec760fa7f2163361f89a0ed8ac8c678bd84. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZYHM2412041 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed349dcee4e0503d6fe94c2b1d62c30cc0e4cbf52f5419c27acbb665a73f249b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZYHM2355025 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fe77bc6e9bc67a8f10e784f16f431179c6d8c9e6ea8ece890d30ac21f250e6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/VNA0R2500515 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9658ac32c713d63a8850bc77b3311d70f0252110df94a987a96fc589d8df4a3. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0R2500087 — a six-check JSON result.
Trả Cho Em - MTRI Prod ft. LEASONS Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44c85ba0a98a4533a7be728ff87507af10bc19eb041d15f1f255da98be843f1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/VNA0R2500602 — a six-check JSON result.