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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d308ed309cc0c3d1e7869742a640a98d11b54c41e274e77dd7e334a7e65f5a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7489e246-38ba-4625-a045-fdeca5cbb998.json and https://artists.proofprofile.net/proofs/artist/7489e246-38ba-4625-a045-fdeca5cbb998.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb19a7f2e8649c3bf05af43517f1e25e482a2dbaa142570caf3a132cabe9de06. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USCGH2157090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f20950959553ea4d6c1ff33193490075ed06fcb73a078ee272d8aca310f508. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USL4Q2249811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002541438dbe0e064853a7f11dac403659b75ffa2968d01d08b67e00b72dc829. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USCGH2372003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43d8c4dd0c7eb2a3bf4be80d40d286822ada61b1a6b9aa2ebedbad96b7a65d4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USHM22322913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b70388a36a7815616dc05ea447f3067d2b762a971d0857b3941f831f75ad1e6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTAX2310529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608776c3519453c42bab3d21c1425ef3a6a8899ffaddf5bc3c94b7d58247399e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTB52395732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068cab13bb87923a9f7780af525b68017a9d7ce2caad281ab38812f3b4b6691a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZWFQ2358303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d60a46342d3fac3e183e5ccfa5d4a6840980a980eba4ff3916829e4fdaec469. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFZ72466020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabd1599d988668807b6a544509836ce96529216ecaea6e3a72be75d006586c5. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZDA42426431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51315b44052ac3a84ab0d9f311e3b9f2e56a6e284b34435cf1ff01130ae3d272. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES52414264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd697a471bdb0b3a92ef2957c6893a420b7f4b9a5fcffe08c65c5c38739ea2105. 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/QZDA72438889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62bcdda44c1dcf487e4b8e6228d9eb9bd87e5efd22c9953b2612a0d7b0570c8. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZHN32400820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291696e9908eee824e8b08d5d80b8a451f96b2020cd7c35332c13c9dbce2aefc. 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/QZHN32402578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041c9c1b1a557bfde25543f6688d5cb1709315d4ac9f1776d2d1e9914d058fb4. 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/QZK6H2419118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0169e6d43b71c7aaa9e9e0c5018f47f4ba7c48cc45d9ad82b1ec1ec07ecd88dc. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZK6G2452763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665dbf25e0272e22ac660ed738d31a931b5068009b28e5c309c0eca215881813. 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/QZNWS2468008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189469fc947123d958574d791b4becd5b9115d311a0cefc60e1d495243dffa07. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZPLS2460295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08629831307188a9970681bdae1bc1cefa3da57df01430fad95fdd29e761b4bc. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZPLS2473395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3719bda071151394ccf25e1a81e78fd01d6f2ce96019b514e0634c13e30de6dc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ7N2402428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc682eae948faf57c9d54194a327483feca2ff08aac9ca94eee4ce82e25fc1aa1. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZDA52501170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b523254d1044c732c1aaf7abba641c0461e0f8e976533eaa652b4562bd0645a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA42592683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be0c861c8f3ca3c4b80e621f87744ab8dafe8e137e16e7d39992225d4ee1f1e. 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/QZDA42588101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ff245f5b33948473491f74afdbdd4c235311f7dd5e0e3f4a2586d935ea9d8a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJO2525719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd90191582f25ee35b68c29fae106fbb3f47fb741e8ddd9514952eadfa9c3e63. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCAJN2525816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43805874c05112c4b1bb97a8f667c77b12052986819285681061e683d0a5e014. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCAJN2525847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e270f545df28d6d0e951d0f49f09ffd7f9ead35fdfd61955c40cdd3a4f339aa. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:33:07Z), 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/TCAJN2525952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49423d2231dcdb5bb77bbe33ba38ead28d8fdb139de3f0afa4376d92cd17a75. 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/TCAJO2526100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cebd975d981f25e64993d3f212e50958245c69c52b68d8cf5780c2968af5ece. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTLA2481893.