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 0xde17dc160a86bb19abe1e71cca46593b777a1104f447918182b4d15b694d7497. 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/af8b8a6f-0b19-4734-88f8-9775fe9e1755.json and https://artists.proofprofile.net/proofs/artist/af8b8a6f-0b19-4734-88f8-9775fe9e1755.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 0x5ed3984cfbb74846b16213023a964581e804073a48d84f2a62a8710986019815. 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/ESA011844136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8884356b72b337eecde764308e52bd68b2d0948192f82309e8d67a31f0a07c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/VNA0F2128020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4909857aaf52216d1b9875c68297356d6d33d76df6fc6298b21bdbb646af2007. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FRS182038473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cae90366eec63aa4ccbed7b45b93003bec68636c1b6b13b54695ca4872d992. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/VNA0F2302874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af1a3e91a448018c7e358a2c485c978901c8994695b2b194cf698bff4b6ad89. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZN882293411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e70f2cb69afd647bcaf39b9c7d6f2de719fd0da9dc6a3b8f937bb9a32a183f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/VNA0F2312092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dbb50d612d39dcaa6c1a001a9a64c140d9b5bf70717b79cea08aa9a7a46cb2. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/VNR011128462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1a6fba454a5898909b6915a1e23176227145eca41884fe1e392947a887dffe. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/VNR011049689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d888a4172dae19986f2be12dfa01910c78464b7adc89b4c327f65beba9cdb1. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:31:26Z), 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/SGUM72100255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a54d6eec5d5def4892b67435558b8e8bd28ac435c4d8ccf740bd6244a5af98. 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/SGUM72100285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af0e3f46de956fddeb7712ff96f579c5a5b3f3e6840f9abe92dd8e37f64ce3b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZN882185703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351679ed4bc396da1e95c9a96712641a4dfa49555fba6fe492c66f64fd09444a. 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/QZN882185704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc7b3b656a48aca91f1156cfd9351a5cfe19ae41ffe24919f79239bf9a1056a. 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/VNR011132098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc7b3b656a48aca91f1156cfd9351a5cfe19ae41ffe24919f79239bf9a1056a. 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/VNR011132098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39791eb4569817f1bce98308d88abbe310e9c75c71f9979140bfa43bd7be9fe2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM7282370201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74570238cc32f309759543d440a25a556e1a52963811e23f9cd39f9de5aa809c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/VNA0M1931539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eddd34c448568508a7c9cee392c1c69d430a135ee07d67879c09839f7b4d25e. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/VNA092300875.
Cô Đơn Trong Chính Mình (Original Soundtrack Trên Bàn Nhậu Dưới Bàn Mưu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ce98bec05b2c111494aa6b0bd719b3537da800c6d0985fa97adfa069831f8d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/VNA0M1937816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37dd87cbc8019fd2e531fc2863bfb865ee69ccbd859236e22a8f6c8e6bbd278. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX872547201.
Ai Là Người Thương Em (Twan x QTrung Remix)
Một Bước Yêu Vạn Dặm Đau (feat. Quân A.P & Đức Phúc)
2 Vạn Dặm Dưới Đáy Biển (Hồi 3 Sau Cơn Mưa Sẽ Có Cầu Vồng) [Biển Của Hy Vọng] [Tập 15]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17b473d2faed242251c8d88b7c1a0c6d45f6d2898e68e56bdfbcf78e9e593aa. 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/VNA0M1930171.
Biết Ơn Đời, Đời Sẽ Thương Ta (Hồi 3 Sau Cơn Mưa Sẽ Có Cầu Vồng) [Biển Của Hy Vọng] [Tập 16]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9542869b9fa86cf46b0c703f4fdec7e79fa5b771096b4525056f71bec2ce420. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/VNA0M1930259.
Đi Để Trở Về (Biển Của Hy Vọng 2022) [feat. Đức Phúc & Quân A.P]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925a89a598cc7319693595c07e3ac76c696baae8b4a753d262e2caed00f2e125. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/VNA0M1929538.
Thế Là Tết (Biển Của Hy Vọng 2022) [feat. Đức Phúc, Lâm Bảo Ngọc, Tiên Cookie, Hòa Minzy, Isaac & Quân A.P]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522361dafd18c9d653e02cef3f96cdce9f84da20435264aa1845961cfcb51605. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/VNA0M1929539.
Mỗi Người Một Nơi (feat. Quân A.P & Hòa Minzy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa921093e9d0ac1c55e94a01bb98d780c1281dfd3612c551b4c4bff1d186530a5. 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/VNA0M1929435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be9f96ab99dde1b6dcd11706c95d3f98198839837fc192fe3120ddfeee8efce. 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/FRX282157878.
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.
REGRET (feat. Quân A.P, Pháp Kiều, Quang Trung, Ali Hoàng Dương & Lâm Bảo Ngọc)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687ed6c1776eb271535d61985914cb3e4c506ed143123c7661c8701c343e5ec9. 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/US38Y2418914.
Mashup: Đóa Hồng Chơi Vơi - Rồi Em Sẽ Gặp Một Chàng Trai Khác
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f000a635b1e256a136dd550dd70a611672d301af32b39169a915620eb1d5db. 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/US38Y2504860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb073e1b56ec3bd369f2a009cbb943b62da8c3adfc999d73950bfba400af2c4b1. 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/US38Y2504863.
Biển Của Hy Vọng (Ngồi Nghe Biển Hát) [Tập 2]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60d2f1b7053909b57bc11172544e07961513c8cb2468abacd41ff3f095e703f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/VNA0M1929383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67671cbe34c22186ec688b7f5e90ac2c2500ae589809f64efa95a8fb61dcda91. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0M1912061.
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