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 0xacb577c4106c69e275ce5d47f6a70969bdd6433c89404e347a932e3fa53ceebf. 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/ea29b4cd-aa63-4956-adfe-0b5d334004c3.json and https://artists.proofprofile.net/proofs/artist/ea29b4cd-aa63-4956-adfe-0b5d334004c3.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 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 0x7cd6cbd475ad1287e9a5574ccadb7288685e45b7b0dd1ba9973db228683f84f3. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/VNA0M1911654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3d96eb772c190ad083ee673e64a5e0780e4a8c9f47b23a61c8aefebdd3aa5d. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZFZ32160370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5714c8f68760ed4a3d1e4224fb47f0226e70f96dcd478878ab56da5338ad1a8. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZK6L2008881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf061270c64258f138879e58e8048a96b13d6f9c25b34642391e5430f3bb8d91b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPLS2003750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29341ba670844bb8860a6923fca87d1a43f1ea7513bc3f0a33e636087e6e86a. 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/FR10S2457450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb92d7481b3d5bea64d23fb08178085fa93bd1f3c8df814fa57486c9c3d19c1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SGUM72400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a366d43047016f7937495c71afdb0c1736bdca8895fc8390051180d1c8b6c27. 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/SGUM72400475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2de02191a208009a89e7794bdf29dd5c003fadde5880f7d65bf1863252c2da7. 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/SGUM72400458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18137259ef5b71fa4f9656c65b66985dc8626430b78553e9ddabcce891ddda0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SGUM72400477.
Có Nhiều Cái Khó Nói (feat. Liu Grace & Hoàng LV)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727617d5afd518c02b924251f0fc56570e71fb0876f22885deb869b72ca80b97. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US38Y2417291.
Take It Easy (feat. Liu Grace & Hoàng LV)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad0ca5e7e69627538c1675bab719a4faad333d6b11525359a72530989bd8b31. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y2417285.
Tình Yêu Qúa Là Điên Rồ (feat. Liu Grace & wAvy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24137144f086aa95efe4d6a2926785d68054040fb13d66ad381801bc5a01b99e. 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/US39N2309946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd16f4dd3fc2f3c7abc225f4b384a15ec78f87fabf1dd602696df99af1a0c53. 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/US39N2307753.
Việt Nam Muôn Đời (feat. Thai VG, Liu Grace & Mikelodic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470bd43bee285ed24c411a83975684d3e6b9f572fc7d4024a9056c0f84323430. 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/US38Y2301438.
Vành Khuyên Nhỏ (feat. Liu Grace) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f905130e384c2d510c2b49d61b045adc03fda5ed4acee9332f41dd7e6b7d24. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y2415233.
Việt Nam Muôn Đời (feat. Liu Grace, Mikelodic & Thai VG) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bff3f5ff17221f4e567115111f43d383b00296e02e3e63fd331c416a62c2e0. 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/US38Y2415240.
Việt Nam Muôn Đời (feat. Liu Grace, Mikelodic & Thai VG) - Lofi Minn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adcfb21cb14369ce226c09935d0d1039c7e87ca315193908deeae108861f4b3. 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/US38Y2415554.
Tình Yêu Quá Là Điên Rồ (feat. Liu Grace & WAVY) - Lofi Quanvrox
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f11d9af802fda011ef77fa2e459057102910ba4bc60b3e2db66cf86d79fc41. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US38Y2415598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cfdf1129a52c5f0d1b911157b2ad181848bc84426a7433320a274d667f5ae0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be0445d29a1f3a1795560cf286b506e7cfd18def7c2b824141c5bf17031b1c0. 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/QZW9L2418269.