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 0xafd1c146bf5d50e5e78c03fa52d90f5782d4e7d5f2048e1e866fc4082f8ab828. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33586e33-d416-43d1-8a4e-761838b576a8.json and https://artists.proofprofile.net/proofs/artist/33586e33-d416-43d1-8a4e-761838b576a8.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 0x714fdc189417d21d060d8a584fbf7bee8cfa2cf9363ba754e112ed6131fd777f. 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/QZGCD1806281.
Liên Khúc Vũ Thành An: Bài không tên số 2, Bài không tên cuối cùng
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea937331aff47c1fa6a586c3b18709e098ca4927af3349f84a8465f92efc481. 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/QZGCD1803987.
Liên Khúc Phượng Hoàng: Yêu em, Tôi muốn, Hãy ngước mắt nhìn đời, Yêu đời yêu người, Huyền thoại người con gái
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd47090f2a0d504663e9a6950b6263945c2bf03ca916b1429df8ff3df591f2e7. 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/QZGCD1803989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e5e4b701c1ebb44bd2a29190a17b7878b69790866d7c0f34d66ad26d5bbf38. 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/USHM81516662.
Lá thư từ chiến trường 2: Cánh hoa thời loạn (ASIA 66)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1e68bf48b323465ad70f18bd99767e025a1234175dc68ef7370d542dbbe553. 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/QZGCD1806206.
Dạ Vũ Quốc tế 4: Thế giới Mùa Lễ hội (ASIA 64)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9e8fec6b5161729429780fb89953a6642389cf76a1a5143d8f333395ffacf5. 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/QZGCD1806259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb237dfe01312b10a078811bc0e0081b410fe30f8aa990740f058f22cce7ce3e. 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/QZGCD1804299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed43b1a8423106ea9be8f324eb55c60c33221d57577ce617358166212dda2330. 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/QZGCD1808410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfabbcf3d51fcd690736b362e43c2a29e3a8719d8244c637d2822bcccf01bb4. 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/QZGCD1808412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9b071a179a2ec119cccba1ee0e8296bffceb7884c048c584391aa6b613e48e. 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/QZGCD1808422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f0c7cba04360d887c909425df41f49e846f83c3c24ea5dd10bba395e345a39. 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/QZGCD1808424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceb9b8e478ddb77fab9dbc2531b4b97eafb27093c3174ba4b7c587125e8cb8d. 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/QZGCD1806038.
Saigon Nostalgia - Sài Gòn kỷ niệm (ASIA 68)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e251c6f57759061e779220677df6df029bed72bbeb3b711fe7da28f41167a91. 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/QZGCD1806148.
Thành phố sau lưng - Con đường xưa em đi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c073ac786f1dbd73cfd4bad698693945b2b5c94f2ff52893c2059cecc078e3. 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/QZGCD1806155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fce97b3c11f1fe63da1eb43474b145b93bb3ad266abf91b790c5c37e9ab73e7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZGCD1804246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cea418d6c56b251bd2dd65c1f3a266b07ea6099bcd86c5d01a9f8e149de6b29. 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/QZGCD1804333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c34b60cd5f800ac99ecbc415a7abb5d48cefb2e9d787b0aae1ee4346c8084c. 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/QZGCD1804231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebc34be5fc96dba722804d39d83340fce4af32a22c6089d6de9175f9d147c11. 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/QZGCD1805936.
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.
Tình Chết Theo Mùa Đông - Trăm Nhớ Ngàn Thương
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26d8f00b0c82da6dca3174dda708af97655f3e4f67896dcf3afce5f95fb25c8. 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/QZGCD1805940.
Liên Khúc Nghẹn Ngào - Anh Biết Em Đi Chẳng Trở về
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d7c44a7233ec3e7ea0123721dc90037ff9b745dd21ebe03d82d6ed417f73e9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:10:00Z), 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/QZGCD1805943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c33901a188aa9a6dbad0211afc96d96f6f9fb008c3d19d4df361fe0a4b50fa. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZGCD1805945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764ffd69b5c074bea3dc13aa072e0140087af6be6dee619b7a9c2b3654f646c3. 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/QZGCD1805948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516805fee5cbe0b7bcabd0aabe238f7b016a89eccd2b940d7a8a03eb162ef279. 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/QZGCD1805955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8f45d4d152fce61d644a267c90c923d39e021b1e83dc2aecd47451788d80c5. 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/QZGCD1805957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bcc48078857972a7a65dbd98d43c8ce621cbf7fabc0b7db4822a70346725b2. 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/QZGCD1805070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0caeff51dad0fd9acfde2c739899c2adfb98b3f9f5d02a869c2644853084f7. 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/QZGCD1805071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcf4f6994efbc5ffafc848aa4da69b41cad94e59ec5741fc9cda3993bc0fb8c. 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/USCGH1641903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fc6393b7f276f23ad5e73eb42acbf90990e09b4751a7c97a459442adf6eaeb. 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/USCGH1641905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0a6e6814d04cd0db72160fc47a5c2cc3d1f2f4b95eca8a76915dd988f1d59d. 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/QZK6H2189540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c38636524e781f24e287d5a2ceb46a8b1a96c3f7553508a06662dde1475ae90. 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/QZK6H2189551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f472ea2f560c4ed2609138ac1b408c8927024c59122fa844811de8915fcd5f. 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/QZGCD1804612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f77ec67ca0089ebd7363fadc77820ad9b62184ef35687ae10349631796a46d8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNWR2327263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc194e128c87ed5fad995fd846efa4f636fe5d0e8ea212aadd43226732a5e6640. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGCD1805018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf54598778d61f75040bee1859a7306bd0d73c1b86b9fe4701c88e6b837d500. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:25:28Z), 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/QZGCD1804792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920ca437efc89103ea761d7d4af2007857cc546417191a5c3e9f3fc02cbed145. 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/QZGCD1804211.
Tác giả - Tác phẩm 4: Liên khúc tuyệt vời - Tình ca muôn thuở (ASIA 69)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1a6ac670a4392e39d0bdd8f61602cf2b0d3dfd3d24e253eb7ebc63038b7922. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:04:16Z), 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/QZGCD1804919.
Anh Bằng - Một Đời Cho Âm nhạc (ASIA 62)
Quê hương yêu dấu (Vietnam My Beloved Country)
Journey to a dream - Hành trình một giấc mơ (ASIA 76)