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 0x99f1eff6f27865ae2472b1ae1369c72f14cf6e585e0033f135a6cf53815b795e. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c97ec7cd-1c8c-4544-b086-a07443ba0f9b.json and https://artists.proofprofile.net/proofs/artist/c97ec7cd-1c8c-4544-b086-a07443ba0f9b.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 0xbf8db9e078dc30cc783c47b124b0331a52ca3073fdf6e3fb2e5e23ff3e9fca9b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA092373640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491655e4414f2f34307d722d82e492078a16652aff403521af3534d1aef7a41f. 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/DGA0M2367056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1342606aeef6bab03e45692d91b81013f5e24edb4a567eeec58d1d68f5f1fd. 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/DGA062314700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dad519a01e273e55b62ab8f2b1d54b25146d1f66f9af7c82a5c6144599930f. 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/DGA052248528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05472540da157f39a8e9f9b85237da757ae0e6c26c33a8e9e1f940db129fda2e. 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/ZAA641100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5803bc290182964e8e892608b6c52d840fdfc8f4d1ceccf0784d5637a666f79. 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/ZAA641100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85ef4280e13b7facc9d5929b8c2f1037df69a7c9a3be34bd2060367d2d27ee2. 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/ZAA641100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a16e5fdb37648ed76bf898499faa538914883ca9e0545c5fbb02ef8fd3999a. 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/ZAA641100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa103b55716f88dacbdd245bc165367ac9526185519b443cec5b1357965592c07. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZAA641100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a49b1196068f173ef9452cc7a1bdc6e146f7da02417d425086d2dabb6ca2f37. 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/ZAA641100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8a045746e002c74e561d3d17ac952f7a865e24616399586d87b6635c015855. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAA641100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28713b23ae8c8d11a70dee042ec8ceabae6ca9de5cf099e61fff08f4761a509b. 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/ZAA641100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41928130f42ae93f8c117b3515fe8e8d33aa375353116ff0e748db1d6342986a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZAA641100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b55657e0c077137e48bb68dfdfd139612b7bcee828707febf0e94f591a5d0f. 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/ZAA641100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdaac02288b15fde93ba3d1fbca7096754a67f084425191937d9d1d08b46c4e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAA641100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82681f7dffb52deb33cad4303ae902639b7f24239058eeb1d15053952f484922. 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/ZAA641100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd763b38c70a3b9b5be1b5be3686fb881d911e8742b039e5bef460b8003b5d19. 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/ZAA641100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4fc95caffd9efeef99baa670c29b45dfe6ef2309ba57c0098143204711487b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAA641100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a4c93ed4b4abd8686e3dfea328d186e9dd8913e727cb30c5e5909f2b6273ca. 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/ZAA641100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688161141a6458fdfe3816d5949e0a8a0b17726a2ce51faddb3b1a866fc0fcca. 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/SGUM72000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc726c31b7859dda3ee5c51eea101c02e5f8e7bfdee9e927176571c5d0217c9af. 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/SGUM72000179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b3563d89e2f7d7025a40921b1511dd9f348101d65016c6d88418c5dbd78618. 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/SGUM72000181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aef37d461ab6300a2daf426f4c15a8655d4788272ca80a4a68a5f29866ce95a. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/SGUM72000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477cb63c574a1bb05c3519ba87d162acaa67af00fe37fc5c8457f4935ed31a67. 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/SGUM72000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bd8d057524dc4c6a47a6951b5ec25ee3398a41f6d491e7865732912214cd2d. 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/SGUM72000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cb2cfddba8a94eaacb3e760bf852a5e94cc360de7d30eb4b6ee59cd6069dfc. 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/VNA0M1908177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc240e0a297d3677fb701d790daefc8b1cc36d8b3f03124934bf17cd6bc0af5f. 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/SGUM72000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a12f58744cccec2544320ce0ce9c4722bf2313ab7ade32419dfa9f913ea626. 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/SGUM72000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871de4212af53b6caf4e8a0a680bfdc689348abb24d7a6f3e9a0bb117feb705f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/SGUM72000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda3716efaf98fd446eac8aea70905a4730b5b4cbb82e72ece66a7b6aa9d96c3. 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/SGUM72000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2f724ff0ce4ee4a68fa16dfb0ef51580cce2cae96d0b687c9409975b7e2d53. 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/SGUM72000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d6ab32bc8ffdaba95f431d1a37f0cac5da30978f00ad23018f335fd1bda891. 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/SGUM72000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bf59f8abcfe2e352491cb0764ebdac0c03c19deb01dbd330397dadfcb0cd94. 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/HUA611300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550562d68b97ca1c262b52d603b5ae1eb6247af1541f193bcd395655f2726c17. 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/SGUM72000220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163d9bce44f02f78d261edc427979b3c5fd8a8ca562f365508bcdfc62995feae. 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/SGUM72000222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0663dc7216c815a8571f84c47b2e4b3e756f50ff5691ac51b773b9526a3fcd5. 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/SGUM72000223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e3ee1959e67cf894560eab439c3de9208c1cddfe5339714323dcfef45936bc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR10S2155008.
Tết An Yên Đừng Hỏi Kém Duyên (Tết Liên Quân 2021)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1342606aeef6bab03e45692d91b81013f5e24edb4a567eeec58d1d68f5f1fd. 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/DGA062314700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa0d3276606148205e9ba87382ea68f0cd6e39e0925bfefe5e9003ebee6fea7. 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/VNA0M1908176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cb2cfddba8a94eaacb3e760bf852a5e94cc360de7d30eb4b6ee59cd6069dfc. 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/VNA0M1908177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3a0edfd88994bfdd742a12d01a194099574fc517c0320e00812d44116cb2d3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/VNA0M1908179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed13f6164b4d3ef94a81faa89ae003c302c9b6361b24487706e5aac1f3e840a. 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/VNA0M1908180.