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 0x2767e92de24cfb3253d847158cadc4d3b26ca4ac65938767ada5ec6d3178f453. 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/6e23fd62-72e4-40e3-a0e8-3aad3791a971.json and https://artists.proofprofile.net/proofs/artist/6e23fd62-72e4-40e3-a0e8-3aad3791a971.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Có Tất Cả Nhưng Thiếu Anh (Piano Version)
Giá Như Cô Ấy Chưa Xuất Hiện (Piano Version)
Hồi Ức Đẹp Nhất (Em Gái Mưa Original Soundtrack)
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 0x39fc805bcffb88614d7fa50ca851c98b0c059eec94b82b3611ebf9f87a6ad828. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QMFME2289237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1fba5117148034fb0ba9ef3b0ce68b9966e94f014f4286ee7f4d7aaa2750e6. 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/QZTRX2111784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463f35e1940214da86f06032881f280907bb5fc10b17ff1c4e2ad787299fa46f. 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/QZN882119812.
Vương Anh Tú - Piano Collection (Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee749ae40141b8c7a4fb82a791b2a4fbaaa94e41420561aa37a61a7cd4272488. 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/FRX202146497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3cb89a1fbfabaeb049517af70d7fc596794f9499b6173e18741f59f8f99091. 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/FRX202146499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506cd18d5cf336564e89b85bcbf27455ba586a1d028a18a66bb85c1bff07fc14. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/FRX202146500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b4e018f4deea87f353bf16eceeb911e4f850e5ea961ce68b865a03a24d62dc. 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/FRX202146504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe2e908db4c9abc9ae0cf489d8113bd7896a5ed9a0aaeb775611963c073d532. 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/FRX202146508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152cee69a12f9f713fdafba1617d3aaa77b894220f4b4498240f9b34048b3956. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX202146511.
Sợ Rằng Em Biết Anh Còn Yêu Em - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430b86d9f3f0c6f9e79251676503bd5b1ee0cee61f1107c4b33cf66f0959c343. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/FRX202146517.
Tìm Được Một Nửa Hoá Ra Lại Chưa - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba7a892c2703a08914a8cb172f0a905d34f449f06211b8d00b6454f33ee78d3. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FRX202146518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20a335c087c14303858e2f929edfea73cd4a526e6b158d223bce4f7d0b1338c. 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/QZN882170583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3754766a0d96aea2adf4cfcbe38c8072b8d77e5ee070972b349a7b6a446f7e. 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/QMDA62297760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3950a96780066fec229403d6ba4bd100459d86446a1314e1f8c86c494357931. 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/QM7282398089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396e6f67b10e035974a736f164298dd0f3322e603238e33919e98c2866303878. 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/VNA0D2401380.
Ngày hai đứa chung nhà (feat. Myra Trần)
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 0xb95de81e8a484f0216b3e38f0283616f38568b4281e7b0bb31a9525d7e3b07d7. 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/VNA0R2000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc7665feec785f4ff8220c11138fb07848f4eca26b759e1c6c96521835ec4bc. 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/FR26V2082882.
Còn Lại Gì Sau Kết Thúc (feat. Vương Anh Tú)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8b143e64c36b12dc05851d9e538799186df01858411251294eb0ccacbe0d89. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R2235728.