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 0x7051d1d169e9c7ed1643779b9915389ab55929d4eb4d27bf015db37235b7cd29. 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/8d312859-2cf1-4b98-bb0c-4673d7c0a17a.json and https://artists.proofprofile.net/proofs/artist/8d312859-2cf1-4b98-bb0c-4673d7c0a17a.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 0xeb08f10e0b9e3f7f3991843380bf32b74e8f1f3cf19a5e34937af3013f14fe57. 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/BXZDZ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95d55c730aca275989e9a8a120e12a83a3459185a295b5370f65f69c981ffd5. 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/BCJAV2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dabcbaa88656cf317cb3345ccb126815bcaf84b313286a5fa6e2e9b8000f2e. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/BCJAV2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8622730b0658bd3cf1a0e1755eb817417ad4ba8e731f030b84b721ae27a226cf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BCJAV2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4499e6122bf293ea5d5aeef2268e2014391e18038ed1bb71a2938c718a33f85f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BCJAV2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84495afba826f9bc83a4ae55b5cec3e9081bbd15abc12f8cd698f1012b5ec507. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BCJAV2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4ef9febe728ffae2aadbcbb7933a493a1746c5e053598a32c72591975e18f4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BCJAV2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13240fe8121b2e3ef52f7868688d01f322f6f938e4c6a007cdd615365dbd2276. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BCJAV2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fca4246795e9fdf93cb719a6641812299990fa3cd53186774c9cb1209796fd. 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/BCYAU2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3248e012d23e758691fb48428b412bf4391c9d2b96ebde5f953b6e2cb7cb654e. 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/QZMZ92109848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c76a7ceece89d7653bc5c4f49b508567aa953dbd47016a6ff01b6ee6f5332e. 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/BXZ5L2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecd37e3e15114b5841650a44f93c221b4742fc74022be3743cc0351a38ae7b1. 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/BKZDE2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf255e7a516c117a3ad5e3689e751155cad1b73eefac71817dce0b2cff1cab7f. 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/BXZDZ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a81a3aeb38ddc3ed3947f426d3d29c20625a537759fc587755d5d79d7cd009. 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/BXZDZ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf8ab3ab62cd99b017abba371bde59899090aa9c6401981fe00ba0b646a3c66. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZNJX2458093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a6ceb878e98dcc9189106c6accc9c49a87a44c1484ff762fbbd6c9d15db41a. 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/BRUM72400897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89c80caf3364c25ba9f1e1f77a2ccb486f7356be8c91c9799ac808aa8d932d9. 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/BX5UA2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bc866a714355b4b27d2513690dc41422bf118747e7b019e8e2f150fdcf6ab4. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZHZ62167535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c4ab36ea736c1f7c91cc0d26e419d0646e5123764b1687d1f2636546a1fe5c. 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/BR9O72500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa429157463a4eec4e7e82497f29235e21c84df200ebec9b54261ab3f0fb15c. 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/BRUM72400900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f13069dd18e8c4312ff00d3da45bb721373f86979e6fc5012e0a7fca567360. 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/BK44J2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932d128485efc424ee05e1bb8003d91eb4c9fef6da8f51eea516a4a8bb054951. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRUM72301721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefd2db8b52a0a76ce39d48916a603ec0b79c6a3477fad2a459abbef495a57da. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BRWMB2300463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab11645e587023a54b2b862f4389e4645be1fcda68d9d7df47b95a451ea8f3f2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BCJAV2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7ce7abcf1cc7b65fe5319d541bafa72f1550b77e92a283a883fa252af5e6c2. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/BRWMB2201191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18785a4c4c9e1ea4e671dacd0b904d460914a002af95fd5254f1cf07d87bf20f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTRX2270539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5324c33ee2402c369296b2b44c8a4e91572a800a9f7b82b93de7606797bf2dfe. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BCJAV2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6f005b2ab88441a8ccd9340c7381666d69787924d055f68e9ebde44d7bcc14. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BCJAV2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddfdfee7f7aba375d4b87d5a68e269d84e3fd38e14854505ebeac7afa904238. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BCJAV2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f0e1023c7a55f47f28cb218cd88eef2b2c540e8fc65b9c7992596626fadfc0. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BCJAV2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58f0b6d9e9b564efa22e9ee854d835ae1d60cb6f4563e7eb81319f728fe6d6e. 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/BCYAU2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe76e2a48dbbb0566aca90823c5228632d6273daa5ac41a5ef12ef84121af33. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ52163069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2babadf6687fac1778f9f24cb9b84b049269f32d0b9829450e8f6644d0b07ac. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/BCNG02100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa244c5b29dd6025d3cf28cf0bdb92a7495da856e21ff061a2aa5400c0e65f5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US7VG2132691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a28618834be49c0d48bae9b025776f46066a7ef4f72055e256366a2867518c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BCO3C2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5159b910ff13a20a702e745fcbbfb2a455aa0bcc360a2d6ba91205eea248d896. 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/BK44J2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d198f64649b816de872da45b07bf870743abf6d301eff3970313bcbdbb228e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BK44J2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda70c5d2a3f70d2562972723535341a17d2135a284b519af551c07f47a78b24. 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/BK44J2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb315acdc840e6d2ccccb0f96e7467cf179f133495ff6aa94776acf11a5ac1a64. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BK44J2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398b794a787a51a8526f2565db28e2b1698fb1088bbc4a0581e2c942d2abcbcd. 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/BK44J2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4399f85c5e418dc94117edc571ba5f37a550fb864dc41fc04acf79547666c60f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BK44J2300002.