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 0xa2264129f04d4a8e3319d799c45ef70c4db92d41f48143c92835b2af87483277. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43f1f468-4dc8-4a8d-afac-bb8bb2d918fd.json and https://artists.proofprofile.net/proofs/artist/43f1f468-4dc8-4a8d-afac-bb8bb2d918fd.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 0x6b9424970ed1c568a57dab20866f3e872f6bf7c1c4014dc1be6e42dd55fcde7c. 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/US7VG2458782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f722d8de5d146547ab2e9b8201adb12253691a8b989379a9bd45e56c891012. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXSD22300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375d94714ade62ff62ed4695220065197dc0f0f306cbb55464b0aa61e21637be. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXSD22400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d32819d2fb0902cbd744c6d435239e6614a7892a507e3d72fc2503df74addd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKBTU2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d30e62742e4b812f9526e7fd2cbd044d3dc145a44d600416d28213d76ec81b4. 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/BKBTU2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbfe0d939e956473474b786d6b0355a6a0f97651e47491abc94f1e43a9182ba. 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/BKBTU2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528e9af2e0e76ae1813f94bdc1efc4db9d9098989567372a794fe6832b7c1283. 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/BKBTU2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1e28e7a721545722fabdf225677e0306cfd1fc35f61eb685e2c6f9e960ba6f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKBTU2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c08056a030dd234e2d9bd85e5fdf25505cb6b4e09e80faeeba8dc48604f1b51. 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/BXSD22300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee714fc899d72a10a162e13f69e8b63efced0796fd016d35100274d7931b36eb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXSD22200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b72ad0a811a0c318553b08748adf9ff240a321f9fd914363d60b13f1868cc36. 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/BXSD22200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28ecfc4e3b3b24551aab5c48d5af00702ecb38d2bdbc0c5d34c8edac57bb00e. 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/BXSD22200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feed67218c117ef887bd32e97305ba7036099b484126df3f27f3eb1b04bdb2b. 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/BXSD22200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e93ccf3a45188120f50f6b996861b902554fee6cdfdc92b2184002bf2fbeb52. 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/BXSD22200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6cf77801e70ccbd54909d76bb1661cf53357133a96d0209ddcd8dcb401866f. 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/BXSD22200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f12db93c4acc13cc647eb7c7201e0992126f8e30324cade4bb0b6115b8451dc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXSD22500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19700aaa73e07ca0024c99c23ed7f417a209d01ea6a87192cbae1b1894c1b79. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXSD22400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b36c10449417e11e139a1038ed6eeed85358fdc5d65cd09dac5a3db858689ff. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BXSD22400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5f12aa803b9760bbe3d5c50d4aca8743310ef862fe2752ea23332df9d1a61f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXSD22300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f679f6ef9236f8d6e7a0533998929fda23f938f2dc602acdd1b14f1e360550. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BXSD22300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf381936885b920f2242d84ccd54b96ca608258e378d5d05e4b2f3869d65f376c. 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/BXSD22300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2590010da88f9bf77ff078fe7541bf16db8afaa8eccf34a98460d7acc8a6506f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXSD22300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43a1f44f7ffc46dc4a8e8c67e961c161829d13bf0315504d91783d627bc6dc3. 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/BXSD22300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19694c7bdbbad55fa17c7fad2aa309e7b5758db9b77a873607a16c92c58aa15. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXSD22300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dee325370678072bf097e2bb7220ab87b5cbfd1b3ed599a7e8a7d2801a94b6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2385897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519a7229f104114c6b8e09ae2f8af89e3e8ea8293b1303e83ac3d0c9e18fab53. 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/BXSD22100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e8efcaba7099230d167a6d30824610e92487ff5616d34616b381be38e88e98. 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/BXSD22100003.