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 0x6951ecbdd2a8143b054bf0e964a8a3c85130b37af497402c20d364e720bf058c. 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/e8105888-6a13-4db2-8a71-88ffff1640aa.json and https://artists.proofprofile.net/proofs/artist/e8105888-6a13-4db2-8a71-88ffff1640aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Còn Đâu Huế Đẹp Và Thơ (Dĩa Hát 1017-2185)
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 0xadb0dafac072f71e491831b156390b35b451c1e550d519b4afc6e4dc48d9f45e. 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/USJ3V1105411.
Thanh Tuyền - Tình Khúc Trần Thiện Thanh
Thương Hoài Ngàn Năm (Dĩa Hát M 3479-80)
Thư Xuân Trên Rừng Cao (Dĩa Hát M 3673-74)
Tình sầu Biên giới - Giao Linh - Thanh Tuyền - Tuấn Vũ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3df360d244bac860eac168f0a98473071ee6eb0158ab7b837e0737f1c259627. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/USJ3V1105680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009180580e7af5ec1c7827f921a282e1da3795adf0c100ee85c37384c4292431. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USJ3V1105747.
Thanh Tuyền - Tuấn Vũ - Sơn Tuyền - Nhớ nhau hoài
Thanh Tuyền - Phượng Mai - Tuấn Vũ - Lối về đất mẹ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ea16059d00b7b9e6aa1bbc0ba108d100ecab64ea97dcb1e5c3b257972a2d9a. 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/USJ3V1159578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb686105a4bde56f6e7e355a73ff481fc699ce018c07f791b33c7ce85e1c8ea26. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USJ3V1116557.
Ngày em còn bên tôi - Chế Linh - Thanh Tuyền
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7ed34f229e3d1414eec4303433cd0a15234262178b9b1f364c69d3d447d234. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USJ3V1116564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa093bc7d2c6569395b64fb51ae5d9e0e0884b7077e4d0ee86a81498c631b46a2. 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/USJ3V1116565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05b12a03884d7fb7809867220e410d0eb20dbbda1a197684b9c3d5b49ccb00b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USJ3V1116744.
Khúc hát ân Tình - Tuấn Vũ - Thanh Tuyền
Chế Linh - Thanh Tuyền - Chiều mưa biên giới
Hạ Buồn - Những Tình Khúc Áo Trắng Học Trò
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469b6afe840d980f65599b9dc4d8097f5cf4bb05480aba1207fc81900e673569. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USJ3V1105749.
The Best Of Thanh Tuyền (Người Mẹ Bán Nón)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991f80b387347db919b3f87a1ac3efb2003e548bc4970009f56ef9701c1e9b55. 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/QZGCD1804528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acb067dd4e834e4055e6d0d3f19b6d0e6aeaeb76c0b1c3d1d6341a35035849d. 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/QZGCD1804529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086978da159fda6c94e421cdd05b40d84ad4d7ec2514b9b217d5d50127b9ebb4. 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/QZGCD1804533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2e416bfa5c7cef82d77ef78dce30fe8e2c9e5f53daab15c4c9c2aa6d1bfd7a. 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/QZGCD1804536.
Thanh Tuyền - Một Đời Cho Âm Nhạc, Vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174796750df707e4d64a90eae0832abb3ed4ba5a18cfaff242504c01e47d66bc. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM48F2001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2172143c4ee70a600f7b7bc8718f10c423a28337ff1738c8881ad717c5f095bb. 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/QM48F2001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9256d9149702a6183000a51be9bbcfd8095331033eedc8334d859fd5b00f0813. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QM48F2001005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b24ee9feb37ec182e72acaa69b314b7922ecf9c97b2addc334fbeb95693d68. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QM48F2001007.
Liên Khúc: Đà Lạt Hoàng Hôn - Thương Về Miền Đất Lạnh
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4602de4b99e2c6cde5056c1546787a658c4e74619b576e07774d7a7cabb7d5b. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZGCD1806546.
Trúc Phương - Ông Hoàng Của Dòng Nhạc Bolero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1f4613247402a29d74fa0a8be6d0503d0113fa5f861b98a36f25ff8e698682. 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/QZGCD1806022.
Liên khúc Đưa Em Vào Hạ, Bài Hương Ca Vô Tận, Video clip: Trúc Hồ vượt biên
Trúc Hồ, Trầm Tử Thiêng - Bước chân Việt Nam (ASIA 54)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60040d69ab62002a69d0c76fb8e2e6630b880254a1e1046ffa45a619c7e64b3c. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZGCD1806488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159d3bdbbdb6b0385c1efc478358883cfd435657595f61c04526852290163c53. 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/QM48F1657405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609cbaaec7227fa01bad78b16e86443c204ce66f43e5ac0bd14fc63ebdcf8ddc. 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/QZGCD1807448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39335030862d52e4bdd3b6a10712dc349a2dbbae8923db60a329ea62a5a0a18. 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/QM48F1758506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a7f359d939f1ea006d0db1b41e163498620ea28435c1da192df43a608c033a. 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/QM48F1962108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f259515b88327ad071afcf3bb1e576528fa120640eb2cac8679919a9f3959f1. 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/QM48F2465111.
Liên Khúc Chuyến Đò Vĩ Tuyến - Nỗi Lòng Người Đi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144a716074e2e92be5bbc1854b89879ad316119ce86f839d38121d3d587f121d. 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/QZGCD1805938.