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 0xcde3d47d98138983edc4ceafa798febfe71d4165dafc2c463af4270807f051a7. 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/25a70656-dc82-4f46-a055-1553d2cbfa8c.json and https://artists.proofprofile.net/proofs/artist/25a70656-dc82-4f46-a055-1553d2cbfa8c.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 0x4cc1ec09189b239937f117cd3c9b36086efd1d8a317174b1e8230544e712bba5. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:01:55Z), 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/USANG2212929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dcd53e072c28b6cf2d912c2164e1b48a82272deb90931a113975e27e874a8d. 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/NL4WT2200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9e91102226f3222be089a785268614e3d0cbc4984c5f07ce18e56744162221. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USANG2237703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a500b8dd7ed7e165cbe4c909036720fd5d8602b155ada7b1fbdd52e65ba96e1. 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/USANG2254737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca5f8f740e62146058dfe3231285d4a686a12216157cd0fea26c7feb7c51faa. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USANG2287224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3b035d97a5b1182efca38a52fc36b14008b5931ad77f5fdf2fd5af4cdbd605. 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/USANG2295043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46b0c390c801da42ab316336b846b576b8712124070b9558358a9ebc58a7d88. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2202628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e90d42eaf1008494dbedeb568f9175d541011abbbee3c140b9f99651c15c3be. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM3DF2278502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12c296498de9dfd64619b2c917bb31c5f37a56edebe028ffd278c005b7a07ee. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QMANG2224234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e7efc80352bc09e346bbf353d8157b933ee19dff29ada14f50280d15d07756. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMANG2247095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddb846f622323dd2a8061ff86c689e65b061a010d9b4e80806c2597f2f321d6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:31:42Z), 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/US3DF2411625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06672925942991a9128fdd777c9b40f5cfced291ea251f415565d1b755df6244. 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/US3DF2421745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c859634ac8a811c0853fba9f385f19d2ed94b937dc9db86df4c8e23d9e29e65. 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/US3DF2453847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fc582f477beda79f5171d078b29598d4998d8f2170cb3e41797582370bb766. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CH7812411430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe662c8dc82bcd8380233e12763c411f23956c4d7cb0e417273d4112bf1162dbc. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/NLX9G2400431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa560df590f7e8554fee98e37de47d024c1bbb98fb36f21edf6dd8fd1f9e9e3ea. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:26:54Z), 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/DGA0M2417906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3501946391202e4e7dad656d79668eb2b20e2446f392585d7ed888b2d887cda4. 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/DGA0L2416714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbc3ac72dafd36fba4c4c089ebbf1e477867705536b455f36d729cb315b899c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US3DF2457564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebea7eb28bedf813051a62739ebc3d396afd2b61a1168bcbb98c7bdfac633da. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:19:58Z), 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/USANG2418260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227984ba3fb288a334373474cd95569b2271d032b7f63f7fed917a613e8d0868. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:53:46Z), 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/CH7812423235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83543d5721c078b1830e294eb8a7ee56313bfb3b5095f26d6213ed9dfe9a5682. 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/DGA0R2498906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185f107edfa6350fd50ef450f39332d50aea3609958c7fcc8f1e2429b96c851d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/CH7812424494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d97e334b9c70d63f94b4a2e6c559591871509b2a1356b040a3268ae37f1533. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DGA0T2425990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dc810f1e5f3fd7a1ec50aeae63f61e2cab5ef589fd5d3282eae3bdcce438ee. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US3DF2508549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dd591fc11bbe5237b1fc3c294177f50b6375775055c93ee600dbd2517a9bea. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FXR592402428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26560889d53f39876b1410a169039208761e355a1c4024d8612c39b90188dd1f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF2559585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269dac71a86b22f7acc9b93451ed3525af5b5778b3d5c619be37ffb57c175133. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF2566635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0bd5f420a2f8957892207113277a658076c2eb646e4a28f8d810825d21c813. 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/QM6MZ2463255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77321ccef8e50034f9171c05a98f5c3325661069df84bab4e302d37e3a6c3162. 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/QM4TX2450041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f4ef5e77dec2a93e2073c1b06cdeb1a3be17665f85105a8068ea2887dfbc14. 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/QMANG2232354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618217bde0b6e94a988d0694148a222f1f2039532bf05c931d9fb79e98070b28. 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/US3DF2505167.