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 0x884e400a40a9867d0a6dc1875c8b0e101be14e23fc85766a6440f329906b451b. 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/f32f543f-6a66-45bc-9da9-65668ebe4f4a.json and https://artists.proofprofile.net/proofs/artist/f32f543f-6a66-45bc-9da9-65668ebe4f4a.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 0x19ba665592c298599428190fdf6871999e35048ca102672f550558f5ad5d17c0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USUM71806747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939c8450a1ea55685adf4d1a601c1f9918f53d0d2f8ad9415dceabbd7b16d09a. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/DKUM71800514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2855086b5269fdbff00f07a6eeeee3602471d47dd85fc92a0bd41b3fb70cc1. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QM6MZ1873150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ba665592c298599428190fdf6871999e35048ca102672f550558f5ad5d17c0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USUM71806747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998e582681e4735e0db3b6e1af93b1067054f778e30bc8f15f7ef4c83faaf8aa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKUM71800677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3806af8e1c1da049f34af2f8f6e02a677be88ccdde890c3d71650fd20439ebc9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DKUM71800679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e98e3318d5d2693aff9f4837ee175237dc5efed56cbc7c3833308771f4b80ce. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DKUM71800681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579f491ecb5ce9ce36f3e255e2708440a8e07c788c23d93e8156e976932be53e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DKUM71800683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d95a6d822a465c0034049f55963b84e5eb66709d5e9b6394f8f79c1c4d0c235. 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/DKUM71900186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0702dcc123eb245a1b1fb3d837c3da1cf72937d92c3ec6d637edd37796f476c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DKUM71900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa36b04ae62c6a91da1ed6120152e37a2bbbb1d8383499862a05ce94b5f2feb. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/DKUM71900245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a3c6b10ca1a68ae975836b8a1502c9b049a9d56ac9f630499a01a05e2e7e7b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DKUM71900246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3256887763274b5978c54253386887c194ffda4c67b26ba31fc4583ca21b8a87. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DKUM71900248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6911b702937a675a2bdeee9c343aafb1064c8979c5e5906445cc9d50be66eb. 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/DKUM71900250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05d79cf2fefc7b43fcb41954f76bdace5a89892aa793c0693091b25615b1e1c. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/DKUM71900303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfcc2d47aabe081d2e2c969337d6ac65546236858389f9f220a12c8de12ce09. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKUM71900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1f4adbd31f2293e97d097ffd9409aff4f6f8d9e5f862eacc24b72a51b871f4. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DKUM72000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4140838559aa63b34d528338909a129c24818d253c3abe3bbee8602655cbbe19. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA62213166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab10749f1c3bf8a723d3d9a8e849302b6198c4749097cf8900e707682b8754bd. 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/QM4TW2359777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6b8330b38e0e8e53be163242ee08877adf3e161268fd03a102193cd01771cf. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QMFME2289086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3636f137ba477ae21f7e412ac630c45530a620a878f397638bd067d4b269cc45. 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/QM4TX2375976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3195169b1f4cd6bfdda3146111b75da95cf7c8a77806863befb2c463b35b2fe. 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/QM6P42349154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4140838559aa63b34d528338909a129c24818d253c3abe3bbee8602655cbbe19. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QMDA62213166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab10749f1c3bf8a723d3d9a8e849302b6198c4749097cf8900e707682b8754bd. 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/QM4TW2359777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3195169b1f4cd6bfdda3146111b75da95cf7c8a77806863befb2c463b35b2fe. 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/QM6P42349154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581b1d78426a0f2d202992a98935e8f6b114ee0e69d85bb297cd920d18c8e86e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMBZ92303488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89ec4ee59babe9d3aedd55cf71ca545587260155b70cd7ea780e6d1a2ac915c. 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/QMBZ92314303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3033e1738905a57644cecdc73287822711ae7302bfa72de63b1ad1847ea02ff7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QMDA72316791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2b5da231dee2da097d2e245eceb2484130feecff574641a79b9daaa72760a0. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QMFME2302840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c38370e506d6d60085cec9008fa1e1484f1dddbe3c0351900bdd3568efa70c. 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/QMFMF2304930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509aca759affdd06a9242602cfc6c3ad041d17628c010f0420c11867912deb49. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QMFMF2340300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346a715b4b37a013e210ce835875e2c657d507a974c4a4b33953dab480cb9442. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/US7VG2464164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b200fd03bbc8b615f06411a01601f088e81ba3c2d6caf6f014f22f8ebe432ea. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZGLS2401036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f01cfdb3d0c7f3e18b371f12a82751747a9cf949b819669a55da214370d57b9. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QMBZ92403392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf26e30f0da0f987aadc88b70b089950c1931c67008db591ccb2166c3313ac91. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMBZ92492474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2f9a59426752b0ac5276a3481e7b9fc843d4b1ec181b20adf1843963159873. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QMDA72581365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be4447817fb2294863eae98d85c6fc746295e7191823d2ac3b832edf826dd52. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QMDA72581366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdac44f12611c7ab9b9f92662a88539ff2c28eb8552a78da9c3ed789153114f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QMDA72581369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ab1996938679c7bcc88c45af547403e5ec23288f66ee7c1be758049e11eab3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QMDA72581371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3366d8f5bb40abedf43c31136308b2a6ba279284dfe391d526f7764534e091ec. 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/QMDA72581372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1f4adbd31f2293e97d097ffd9409aff4f6f8d9e5f862eacc24b72a51b871f4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DKUM72000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfcc2d47aabe081d2e2c969337d6ac65546236858389f9f220a12c8de12ce09. 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/DKUM71900302.