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 0xee1d31e4113ccca83725f9f2bfeb1b5dfc925241473dc6deef15f785308afc60. 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/cdf3919b-ec0d-494c-80d2-308fa8af7791.json and https://artists.proofprofile.net/proofs/artist/cdf3919b-ec0d-494c-80d2-308fa8af7791.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 0xa148e76ee451fe74b2b79f3f55fee1de9873990eca86301bba68c93580a581c3. 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/QZNJV2378313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575f6bb6369a1cea58582ff1ed549306baf10d30e76265eb98a67546abeaf41d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNJV2378317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a464483a2c84a7f2f74d00e35f685c574d95685689fc0bf4cf7fc3c4925feb. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZNJV2378319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb70594fd4f3cb9770832cf1a7c9ac2f44e1ccd224a9b2b679f5cee180592b1b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZNJV2378320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc099c39328dd1854d996980d73a5612caeddb2a37e9496873e7c12e1db3b79. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZNJV2378321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe77060aa1cf92f813ad89e2f28ea1a17b3909231ceee58f91f39c67fcc5ed4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJW2390906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8aecf88b393b49c4b78083b7c0f0111d2bfd9d90814e6da3943a6eb90b0080. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJX2346664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186ff4c6b097fc0015503ae91fff3292e223db01a174ea3e36411f971508cc95. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZW9K2373112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b2663de8a93fe6b439b932201ee38c3f5ea489221ba1bfa312f12b12da6868. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZW9K2376357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8d282d93546452d31ffa43c79fcc207b5e78f4929ad327d12df64c57559bfb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZ5AB2438318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ad53f5b2b9a0ff78965171147a9632b6a678e8eee4589433c66b505caaabff. 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/QZ5AB2494832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3f1b7332bcc4390bc3dccfb94574a387d4b27202b454392bbc8aaaed73de34. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZGLS2475645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d794f7ae510042aff384fcdea75da547d24c214d631fc159a4df8facdb60ca. 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/QZNJZ2460417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c29a3e9823ff994f9e4129ff61c900e179ca8752f09d99b349d0fb4d9ceb7c0. 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/QZTVM2411564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8331c7b1345209928768a137c55fe075405bcaf140a9172e785b2b97d3aba3a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZW9L2473593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed88de6622e8e5293e73ffa56aa4ac5af7a481333a5cc13cb22877753092365f. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZW9M2448815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73a5b45d9c703a315cee94439663736a712d85aa6169a942cf2a3d48147b411. 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/US7VG2592926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d0f6ddbe02ed68c85d968b450a5da11c40c9940f5c211601ca468987afea0f. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZGLM2524646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c3cf150452ff46843a99c78b9e3c7b0da934e91c830a14b1b2c86a990150ce. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZGLM2579799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd23d055708464e58551a6e29ad53fd4912dcb413de029aaea46a608d677a830. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZGLS2502354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9efd1cca2061a1160fda0c7cbd532f17ea321d58add5a8f585e20e00285993. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZGLS2579753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b16779745fe6dc159f55dadffb2e9c303040f548e99b157ea4b21ca9e9b7194. 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/QZMZ92529305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e04aa1e629528dbac5a28806fe46d762c37ca526267f257624b50dbe39bd55. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNJV2504143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7081e96aa14ffc5d1ef4356bf1c5e13fa68efad74c121fe95473013706bcd9. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNJV2547447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1da042abdfa390b331ef36b2892270165120b18a9371fb54f3b117313abdf0. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZW9K2527765.