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 0x7e11fb4af93ce9a5d0a92f9020dc6a671712e8a42a3f46efe9cdff6fa747e948. 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/c409f1b7-d212-47ea-8354-48811e8c395f.json and https://artists.proofprofile.net/proofs/artist/c409f1b7-d212-47ea-8354-48811e8c395f.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 0xf3c4d7e76480efd2c3bef53bc040756e2ed11d28d9bc533350a340f3e90907de. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USQY51708111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a74e240bedd6da1c8a4a8ad48a73b6f9f2889bd0064da4dbadebc7455263e1. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USQY51708114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bc46c6c21363067e666ff753b42b80d49f9a130d25401f300be3c4ae113fcc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USQY51708116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0997eab239924fddd67d0fb295eb63793547e1ccc5e753a7961bc90538cfdb89. 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/USQY51708119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e112e667e8c4dce1f4497a0e3fb5aaa7e15e1b91a130d95c27876734469632. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZ8251716410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e8abcbd7e3fc521fc6f65d7525ba9fbac5583db8bc9cd7a4da9da0169648a0. 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/QZ8251716414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70facbdd24bbdb47f0eb3eb8811307f25a370359f797ec1cbc9f5332693f0d8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZ8251716418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15a53b1585ebbf6af523d3c287f0d8b52a5b9d24b2fee9736bec1079e3779ea. 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/QZ8251716419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e320d1914bb1f41456c2f781b7b2d314398acc88b1339e6b91301f734bd53b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZ8251716420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1907a4d857f99fa1668b0f1d7e870acddfee0ef072ce4061080d01647681d571. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZ8251725248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12414610453e6807fc08369c9eade04fd2ca410f93f288b8c04bb9c0b60f447. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZ8251725249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e93669d67b71669e009c0ac3558fe702cdce4d9a5a33d112a7dff328607fe9. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZ8251725251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92490ab7731de29be2e117ae12bf102b6d60b5fd619c34b47d81170775a6bfcc. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZ8251725259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f2d600324ebc810ca0f35339063ef91faa46f559b178c52c271c7ee86cc0f6. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZ8251725260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ae262d5881399b34fc789b82507c92c5bbae1a16dde2af0fc5e05b8091cb13. 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/QZ8251830794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a263ff3f32e462f41f0d5ece2eab84f7782313c16d8278ebb713854d1d23e0f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZ8251830795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b29e2b419d0b247319d54593d1623e526d8f9f90fa811f5ef9daf43d7c6924. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:31:52Z), 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/QZ8251830797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b8f913ac16e25cf22837eb09cedb45f679e1198c5b372c1d15a8d2783e876d. 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/QZ8251830800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc174b35edc17b00dedf51acc04a6b172b21b4e64b19a730b16b70404d8c8dece. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:07:50Z), 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/QZ8251830801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814845b87eb8cd679cb8636d0834515e0a2002a6eeb44a3a0d8634b94c771aa1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:53Z), 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/USL4Q2097891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8a3b2f51cdf435145d2476bc5b18069e27644abea546c1e9a58c033e595b12. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USL4Q2097900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae7a4a6d8b6d3250c43bf477bd584bfe75f64de7b8d33b0c37b18c3e189ce74. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USL4Q2199189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ae243a6acb1867ec73d09737dda3ca225fdab68993cc04aca16d4585b8370a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USHM22229530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3402bdc5b12aa0e1ae403a126f19fe9326dbf351d49ea3ce3b8be0336ba7080c. 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/USCGH2360730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7155ffedef1edd12a347197bdc6f3cfe060eae0038332333a0bb67b1218a0ca0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:56:21Z), 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/USCGH2389421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5291d1bd3b61e8c5ad95679849a47c5b5a1bc6c6368fe83103567185500bd06f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:06:10Z), 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/USX9P2346093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141c3f24a4e7e73e1be41b30bf7df3b2ec55cac8fca68ff300ef48fe3794c5a7. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/USX9P2354952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4059ecdede42514d8a47f78663ccc75bc8b8b9d2dbf9e5818c0a0aa79e277a7. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USDY42492524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811b5fb3eda65c670a6ed53eeb61576a893b83a4f2edfd446166569b1f2f924b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USL4Q2487323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a1a4600705fe36a60d2f410d4473906e65cc05986f1511a8ef686fb15d940b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:36:28Z), 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/USX9P2443858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb5a18d65b16bcc4c87df6fc81b421a61ec23b257976885ba8fcfc16e9bc427. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:44:31Z), 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/USHM22597106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ccc516120b61dec3b98255fe3127c105be5bfbe98ae59f74f63303fb5a90e4. 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/USHM82516187.