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 0x2cf79ad2cff30ff06952324d4a4a187f66bf71c33ca449c33b27a99db27c460a. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05f35c63-1c1e-41db-a27e-c1d7c4e0bc37.json and https://artists.proofprofile.net/proofs/artist/05f35c63-1c1e-41db-a27e-c1d7c4e0bc37.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 0x3e58441cd5f80f29bef8e60205933c451ec22f180fd9c196e1fcd274c3058776. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/VNA0M1843951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de50941015e1d4d59552a80c51b424888f49299b36ed2222378474db36b7250. 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/VNA0M1843953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74934151d6953d82ff905e419e370249fa723ae074cb32b0159163ed0de0620. 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/VNA0M1843960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497d77737b49252d8f8aae684a696596bfe8d3091d4dd5ff93cfb2a5b640c0b8. 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/VNA0M1843961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aad70910bf94dd6dee634a4d8f544bfe5ba381b0aaf5cc3f08178a8bd329a3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/VNA0M1843963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e73c75cc83ee81223c57dddfa90cfe9c6951a01e486f919c1ba51c2d05c58b3. 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/VNA0M1843967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51958671e4298c4efab692e66698e70e322a01fae9e8a96c7d83e49ef7a1602. 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/VNA0M1843974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59857c7f4a69dde8db34cb441629e12f74027f5aa2563b47bf2446aab78bb968. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/VNA0M1843997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9247b4efe5d1aca2433130006174ded9062c34ff365d084896e8c5b66daada90. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/VNR011042182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6262d9a7ee6bd838bcc8f1ff202fb9160ef2b8ab66eb10dba9661f7ddff998c9. 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/VNR011040674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582429bec5f5049e4805d7d473df4e3dc1c697781a89b9a118f881ca1b399801. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/VNR011040679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04a4de474c1b6cb0b2506a80861c11a6e384b9d94c6e2cc3206273a07d0750b. 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/VNR011040687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c5876116cbeda12e8e1be0fac5a2c1904993532eb09ae72653effa624b4d5d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/VNR011023423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60be0ab4c2e356cc6261cb9618b33b24f24e9a20460acb49af1b477963597e7. 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/VNA0M1843927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d78bbf583e298dffbbb7d351e04902a5f382d1df42cbc70c24eb66ae9b2088. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/VNA0M1843928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ecd197249a0af3f6a2c40238cac503530d42b5f54c21085b9cca78d7d35d2d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/VNA0M1843929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c86e3751b73ced9ded35c92f6aaa5974326b7c06c1f647b7fb69329738eed8. 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/VNA0M1843931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c9c28f8a85f14739f05b9975b303ab6fffef47b7123e7c110df06628bb537f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/VNA0M1843938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86b8f0225d0f55d0b2689c8b89e5d0ec02716fe762e28bc873f48dfc78bd91b. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/VNA0M1843940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6305c6f7853e9e9fb542895cd01ea05796685f68bf328ffe6839319bb29f01a6. 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/VNA0M1843941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd753f81fa345550854bf7dbded0fc156d1bf59d8b968f8798b2787a8d16065a5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/VNA0M1843852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4de314b853c2aa584a44a84af567327af9197b62e83aba165a335c977b6886. 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/VNA0M1843846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c9edd18161151f376b2fdaffdbcd723a243073ec12486a2f7b26c97b822c5b. 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/VNA0M1843847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba1d4d4bd842666fbc2162dc1408b9c76b6547325f0ab69068a1712c8666487. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QMDA72264856.
3 - 1073826732 - LK Tình Em Cô Đơn - Vĩnh Thuyên Kim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb090ffc871b1a51b48dd6f414a1b85206a832ed0df348a439fd1809c2eef14. 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/QMDA72264858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f3d7383c8fc55114795f3428ab429ffc0748613d931d8b29de1c9432d42392. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/VNA0M1843883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9b625108971d4212920797073e003d1b995b3966a14863809faf498e91b32e. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/VNA0M1843886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f1f10e3a74ab335bf9a4750e11479e562ead106ab624766a4b30e51fcfc007. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM4TW2379455.
Anh Vẫn Không (Remix) (Thời Không Sai Lệch)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22253a8b3e5adb22d5bd3604fc56daa3df65faf23d19d7dd938245a3c7f4b07. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMFME2289012.