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 0xe5ed5a539765fe18528dadd4b627213dc0956d94af6dbda264a6b6c2e546b4c2. 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/64f266b4-d82d-4472-ac00-dce4f4d2c1f9.json and https://artists.proofprofile.net/proofs/artist/64f266b4-d82d-4472-ac00-dce4f4d2c1f9.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 0xb98a925e298b259a97c1e3af1fcd3f89eb242d5071583612005b56284c87115f. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/VNR011025366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b6038acbf076c105b0480974f8080d4a5a79982bb6a2d988d6033855ede192. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/VNR011025211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b003fdbc581215310da8fb17fa5d90e71375c259ff496e87750979f6b988bf. 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/VNR011010658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d46dd5726fdcd57dace087461a5a5693c54c3cd946b397ff8ed3f1b3bcabaa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/VNA2B2501197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccec202a7463ccfc0db6feaf65cbf8be547fdf9968d7d319a47f2864a16a5e3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/VNA2B2501198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2724554af6510007f4f3c7fbf85d1fe8e3e8fab913940a8c9b2dcf72649ce3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:52:13Z), 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/VNA2B2501199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a503d8ca0baa28619394e561e3054689640c33dfd451eb399fda108df7ae85. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/VNA2B2501200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09483743b0379ae9ef3c1ac365ea92d59cb42de2c149a570475392db461a30aa. 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/VNA2B2501205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75820e3b2ac22e7c3b5ddcc60759f40ea4f190fdffe703b3faa493bb2f31197. 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/VNA2B2501206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60662001d342deeed6bddd8dc339474d5037930709683232dcb61458c5bc2397. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:27:27Z), 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/VNA2B2501207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62710d981eaff705882d552313689a9c070050793f7feac21b7de34ac4947e3. 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/VNA2B2501208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414e32421d14f67467ff5536afd5107c082db9798752f36a7fc0aaddc42883b3. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/VNA2B2501209.
Lặng Thầm Một Tình Yêu (Live Concert SKYNote - Hà Nội) [feat. Phương Linh]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8650782d5ae2b63b0211208ffc2f90088c65e7652fce0bfaa604f40d65e612c8. 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/VNA0M1939744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47b4435f842091b54c89f8a56d0c41f4b86b6785d49359c391512927eb4ca67. 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/VNA0M1925358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df9c414d3c18b900fcdeda1d20994c5ecab204bd5ca5b862b0743b1f04cad76. 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/VNA0M1925360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c91958b61a8154048f6e558720ca75526b2c083c0f431e459f1adefc95144b. 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/VNA0M1925361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41eb5c6b2947687cd6c062fdd391b8a141bb17d42f44662b5d784b9219f72eed. 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/VNA0M1925362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688fe4be0cd058817dabbc54f17f6ac492ba9627dd3e120225a9a24b83453b0d. 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/VNA0M1925364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368864acb469e2368d063ebfe0e71094dbddd0466f0b1c775dfa2964a41e8472. 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/VNA0M1925365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8777975dcaf1f3b05f1ba8fa80e83ac1b4cdee4243fdbd661db21435abaf664b. 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/VNA0M1925366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d75cbf565808ae50fddc67982575f5194781c28eaecac0648992d5b4feca5f. 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/VNA0M1925132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b75ddc31e5a7fadd011370033c2ef22f83fd846d980443d8b834108f08d7d3. 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/VNA0M1925134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09690efe4fc788e218c44fb381f5ca85404b4f457b2a2f5f9ee73cf4315dd74. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/VNA0M1925136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc86f1f7b6b9c09d40c1f4cf4ce87a844776466ee77ee18affcf335d586d8b09. 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/VNA0M1925138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e9419e73bcc7d2463fc2f959f1c86bc91222ce66da79d640fb55c8a4c7741a. 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/VNA0M1925139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53adb694635815e7499cbe5b501914f6463735581a89c6bc7058de628599470a. 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/VNA0M1925140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc081e88915fa87eb58ce02b9c469452c3d8b642a329d11b74a11042c48f6b1. 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/VNA0F1718930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e1a15f458a8457e8ddee4bf7d55abf09167929e6479772d89bd5af68e2a8ca. 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/USJ3V1229976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea75ded9e757dbc8944cebb78452a7ddfff67ae3975f9e6d9ea29bcd75dd5544. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/VNA0M1925135.
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