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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe9dad40401c84b6182ad69359dc818a1323e63ed2ca9f6e1cf7de07a4e55e7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3c594c2-8c36-4f70-810c-b27a70cb953a.json and https://artists.proofprofile.net/proofs/artist/c3c594c2-8c36-4f70-810c-b27a70cb953a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e27596438f3ded150fdcf6e0abe5c857d3ccab21c918a90f00f4cb673cadc2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:53Z), 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/VNA0M1842632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200931be5a1fa5e08c792e30c0626269a250923b27360f063335656cee71acb5. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/VNA0M1842647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c48adce9bb0fc87f39396fd5d9817c89dbee6a4c0a6c0d75643f9c84f3b98e6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0M1842664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f80b9d9b694aa6e4c99e1bbecf2b86dc6c60fabc363ca648410631d5826b17. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/VNA0M1842579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea959b966db09e9f343b32918a46233799525e3bf1a8a2619a81c758d2def0b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/VNA0M1842582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa073595ff69885fc2fbac2c15098bf5d112c020a882c023554ad797b52c7795c. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:30:07Z), 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/VNA0M1842586.
Trăm Năm Không Quên - Quang Hà Live Concert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0fec549913da96d7c8d10198be8736afa4bb90e02f77875048a454559e04f5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/VNA0M1842731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3d6db103dce0b16e758474154eff8eea8fdcef696506d135dfeed9ec91d254. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/VNA0M1842708.
Liveshow Quang Hà - Trăm Năm Không Quên - Phần 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563340d1b110f02320dc48ccfa41c7300cabc4252591823ee2b268315a619837. 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/VNA0M1842757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe942206dc91db6cb6a4eb7c111eb75a5080aa84d9a365b21a4fe30672f9d1f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/VNA0M1842764.
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 0x1614eda181722b9e6b11d3aaa8325529791a4f3aad9d11fc6872d53e40eaf93b. 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/VNA0M1842784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2395747121a09953757f10844ed02448c5f43b08717d5f5cec6b822e7c22e60f. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/VNA0M1842793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e64d08631b9919a362b306341b1f634df4e7221de186b5a1c5dad49c2be1729. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DGA0L2499151.
Những Lời Dối Gian (DJ Khang Angel Remix)
Chắc Anh Phải Tu Ngàn Kiếp Mới Được Yêu Em
Con Tim Không Đổi Thay (Xuân Phát Tài 13)
LK Tình Cờ - Một Ngày Mùa Đông (Xuân Phát Tài 13)
Con Tim Không Đổi Thay (Beat, Xuân Phát Tài 13)
LK Tình Cờ - Một Ngày Mùa Đông (Beat, Xuân Phát Tài 13)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d459742c755a603746ab6e85b489f91b2a38403f231aed3f1457ef755c38242. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:47:20Z), 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/QMFME2380174.
Ai Vùi Nỗi Đau Này Dưới Cát (Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7225e759d79b8b53cd56ce13c43fe77ebb1eaeb46af7572160306d11082ac60a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/VNA0F2319032.
Chắc Anh Phải Tu Ngàn Kiếp Mới Được Em Yêu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd36b2e30782df63f8883fbf7f23cf099c5cc4fcc7ee103f0d3487f987564b3. 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/VNA0F2327539.
Mashup Dĩ Vãng Nhạt Nhòa - Trăm Năm Không Quên (Xuân Phát Tài 15)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb314cd35ff0f17a53b30a90df009f3c00dfc589301d882042b0770888a98b3. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T13:00:34Z), 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/QM4TW2566753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d80c8cfd6ee4d0274b5c5ba3df63e21f168739db007b1cf99fc274110fba5b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:26:49Z), 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/VNA0F2505469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f116d934b5fb0115875e6fd580a2ef44f56ac0f7ca8aed4fab4a434e413b525. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DGA052586580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fad23e231ab65d3a48d538ddec853ec3cf4941b7aa5769f5310a368d3c12c47. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA052586581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bd3b131a845f94e1a9969242f47a922b7cb4da87f3867abab735c67f761253. 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/US39N2513495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506110ca553bdd501acadaa4edc0eae9e52ea2605517381e0bdae3e9cd3bb752. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CA5KR2028812.