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 0x86fc0aa6b8a8662f1ac2b6abd32c14f69d153636944ce36b8acda516465b6aa0. 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/cab9b544-d5a9-42e6-b9db-6907f3955105.json and https://artists.proofprofile.net/proofs/artist/cab9b544-d5a9-42e6-b9db-6907f3955105.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 0x41f34ab563d39797c5e8d3ace93b0e7494d50c1bcba4c7fa7d43dddc6693bd0c. 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/FR96X2157558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8129aafa4044a01afe2d8540aa576be96b7afac9fe50491501c57de0d0e8040. 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/VNA0R2500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d6fd83d457a9e75948ffeb5b51f14fe8621b0e969841cfed13707e1dcc0fd5. 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/VNA0R2401163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf05a2f1f33415b096e4f24da7edb504e36e93e69c4591b4b58b49079432495. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QM6P42423271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80773b531cfa1a85a2c828948bb89a443883f49391f1ad974ac5e6b699cdf2a. 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/QZYHM2416984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd9f33b31b9a22a4a61d07ab96e892e2a41b2c8e938dffe7d4ba8e7935a9a2a. 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/QZYHM2416050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45e6612bee30befdf561f152a74bc8f69fdab30fe586208b82be501fbec7f85. 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/QZYHM2416051.
Tình Sầu Thiên Thu Muôn Lối (Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570176d5db72a790d4546dd1beade8ce1ac649c1d66d4353c406cd1cafbd7dbd. 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/QZYHM2416052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffe75aa1cc633fd66a48874e438969e0a5348ce4b885105c119960468268d0e. 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/QZYHM2403863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b41ebf337a033164e5c89ee8401321fcba52bc9b9a3df06ce125887abb131e. 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/VNA0M1932743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6f3bb0423e49f402a16f096879fc0fa8db61b33d7675d1cc7151142394dc64. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QMFME2387363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2c129b5fa19f007c37e842852be7939a9dea5f3f80b9d93c6ecdb1656ccf40. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QMFME2323895.
Gala Nhạc Việt Studio Session Tập 12: Doãn Hiếu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec51c0a5818e7942e527bbb1300c3aba74d261a581ef651e28127306bf724b5. 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/DGA052371283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12ca90b9d9201d2de9c411cb76291d1ccdfbf232db69408e24626e3e543fab3. 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/DGA052371284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe379eebc4adb363cc26aa969fd093c5a84f14b3321b6adfbb872e1a756e9eddf. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DGA052371285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe331494a54a5f641a375ba6b49b8d244f981924a8e47ee738399e65a22097ce7. 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/DGA052371286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74570238cc32f309759543d440a25a556e1a52963811e23f9cd39f9de5aa809c. 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/VNA0M1931539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1ac190e53c19e1b6cd768fc2368fb316587b08ac7c5e706f57faa9d06f386a. 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/VNA2E2210154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d72c3a9fea2f15dd154ea540e82bb0fd2b2efc2d6ff673ff40344b33236fe73. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DGA072269355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f8e764f13e5c7ea63777ac49ab9b300d444d67f03fb9b40359e7bb8f46b745. 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/DGA062233167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94f32981c0e026b16538416ed72ca76c098c26655c632bfadc6987979086b00. 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/DGA052288115.
Hình Như Ta Thích Nhau (Speed Up Version)
Hình Như Ta Thích Nhau - Speed Up Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bedd187ab78f5fb67c2690057fd3c2b2c4f12a3e4823d2d59ae68c29c188ee. 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/DGA052255617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82d179c606960339872a9249476eb7413ee412db2343d70539778e4695326dd. 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/DGA052235052.
Một Thời Nhanh Như Một Ngày (Official Lofi)
Một Thời Nhanh Như Một Ngày - Official Lofi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c8313ed81c3ed65861a6338aab24673ef260bde62264495e0e0449cb87f160. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRX762252142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccb5eb11ec33e6cb4b4f874aca426f3ea563ca48c7132c95cef502cc5f8f26b. 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/FRX762252143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64851bbe7b870b2715b06124ac1d738136d6dd0179c9da46a55a7cc8feea8c4f. 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/FRX452246622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a67a4c0f09672cf3b8d27632012fa702929dd62aa9bd40a89ff4637960ee1fe. 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/FRX202224632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f63c8afdcf2c0f5f6723ed282798d5c4789394e80af799a6236070eca5980ec. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR10S2203713.
Bao Lâu Ta Lại Yêu Một Người (Lofi Version)
Bao Lâu Ta Lại Yêu Một Người - Lofi Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4d295c79e2bb1501b307893ac927986fd86a9bad9c8404feca7183fa51cdba. 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/FRX762163505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903ed02f25e316b33a29deeed5dcef16a26203232a2166397bcd0a822ab84406. 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/QMFME2247660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4195ad0dcf562ca67b74415f5ccd369257e0d81e2b9dd43509439bffe73973e. 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/FR59R2144529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e309756485e044911ec283b25de019d5668655096a91335a0fc949a8a646ddb. 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/FR2X42185003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802e5fa6a99e5cf0ca46aa8d93166680a7590d3675746758c0eb6c3db160a5a6. 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/QMFME2298356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1aac2f8cb2802febf78a4c1ed320c8c5e826ad9c9e06a61fb0dbf4f46be187. 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/DGA052085326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bf6e60e87a629e0411c1b9a50eb900e7fa3a89350a31d17af449adaf3b17ca. 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/FRX762020409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa144c8744ff94f61fa6269660545494d2892777addadf38944307959519c7735. 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/FRX762010329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27391afe9c406b11f6ed86911c7390e6bcf9a33dd5322ce8a93dbac90285dab3. 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/FRX762011738.