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 0x5f888d7b82f8c1f6981191d22be5dcb6d7d997b42028cb18170b59b5b4e4e09c. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbd1a523-2526-4596-afa0-b498dcb2d8de.json and https://artists.proofprofile.net/proofs/artist/dbd1a523-2526-4596-afa0-b498dcb2d8de.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 0xf3dfcde495dfed8ffd4208555b47e355474e58e840d658895d584a30df443400. 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/US83Z2237918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a5107fecc16ceae981e640f3422e3b2cc2783da5fbb90d69607ee7cbe0d8f9. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/US83Z2237919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3d9aebee7a764755303b7b416c8f5b2d37dffd9494cb585c833791ea460e22. 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/GBKQU2380039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b2ea2369cb0d64f46ec64ffc54ed961e324b6d21d7e83a488d06f896cb6b50. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/UKACT2372843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f571688dc590593ff0f83ffb3b408fa918e985b2352e94abbfb14fe43b7432a. 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/UKACT2330638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf939169a44b819ef55c66d5db0693295b9bfa81a7dcc5dd56d0bff1030358bdb. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/UKACT2132857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b593c5d465baac2f0376f656f345a68ef005714d7039ef8cfa81b465cf6783f. 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/UKACT2132546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aeec6ef7feed90d1f9341d0380d65ddaab9d9f27c974c8a9a14750c5539d0e2. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/UKACT2132547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b43487d83fbfb85832574834e285e669448f3708786f223d0024084c0949557. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/UKACT2132548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac802c75cd1ca6f1ac00ec99c09eb55224c227d8dd9b89b77a6b3d8bef827c4a. 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/UKR6V2070226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda154544052a88cb8222bcbd8f2b8f6548e51d2d7e9e4bd14ccf43588edcaf3. 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/UKR6V2070227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fb2a413e8393b25547c7523b161353eab0f30cd0a8c95bcb820d24fc9e86c1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ITZN62400286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401c5a1ed35d779f8a871220c438e8f3cd0ed94bbda4065b1cddbbace0bdeb9d. 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/UKU932400913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efce84705c409d615c53e477beadf63b562d8fe9ddf01dc638c212c273395ce. 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/UKACT2331366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cb2c550a0b6b8c68e113760f09fa9419113dd61d35e2d955c5ab61b1138ebc. 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/UKACT2331199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884f480bad6c60f5ae5040d1aefd709467317914f38639e073dad0ea971520db. 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/UKACT2331234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7600c15f69288acd2edd2a4b0973aff7cc07f0f07c2943ab6f6894f900ac9cea. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/UKACT2233369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4cd4c0bd43c1ee3a62f1655a67324f7c7df0b5b23c82e3968edf71e2d13d79. 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/UKACT2330875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c87c13d398d363e3c8e1cb2f798c4a11d1a629606e5b3b180defcbd1f978ef5. 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/UKACT2331288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee5e263eec87db288a46b7d683592aee00f66f4e4890f0cc1f624b5a1dc8565. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKACT2330541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7748aebd361849092d8f4c69395919e5ed468a0788158ad15f6b6a5e7e685c5a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/UKU932321801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6247d2495a4ec3328f8e2dcb3bcaabe3b961c5177f3ae26ca45cb98d931493a2. 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/UKACT2331181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bf5657e1d4fdf4817c7801e4455b635dd8437f875cf555550112c4aa98ed3b. 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/UKU932380865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe452bccc43d6fec303f208c68e54e566fe56b60d0d0f170ee933c8a4241ae02b. 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/UKR6V2077620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7e7823e8959fa4965a6ff5ce04ba8463a5d55c12f5ef6639da14294f3c553c. 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/UKR6V2071023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde177e71cee1edc0ab5231671d7dbac5cb995aec196b8a1c034545c0d38b718. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/UKR6V2070823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3d9aebee7a764755303b7b416c8f5b2d37dffd9494cb585c833791ea460e22. 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/GBKQU2380039.