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 0x6c7123b280dceaeac0a96b4fa83167c8a197bd20e0776b16eaeb8a2d3bcfee82. 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/5b3ea1fa-6617-41f6-b1bf-5e1939d816ed.json and https://artists.proofprofile.net/proofs/artist/5b3ea1fa-6617-41f6-b1bf-5e1939d816ed.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 0xe377a0fa2f9771b9119956ed6bc39b59337aa31d48c6a5a8ffdb1c77ffc3089d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1292380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d4fe3479c120de4724bb268df1aa870c7355b8b7fc6acca76ccc20a0e11a28. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1292381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb55933d76b2f961824b7a4b1a1c3f8a2aeae3efd5dde2c1cd355558297594b. 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/USUYG1293473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a510e28afeb24dffa35e4752eed3afc0f6f995a72480b1e4b8935c8d37a074e. 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/USUYG1293474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0717222ea52afe3c4c36a4419eb6f941c28c423748afe7b17750ba0ba9a55e13. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUYG1293475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9568a762a344857f3f10c138fb17b8c524e7f874f48510184365565541b0106c. 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/USUYG1293476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4b99201240dff91b8b27f882e2010c3c1cb49b025d8d4c1feb0f3e9bd39809. 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/USUYG1293477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46db7480adc77a80bfccfe3d3fcc7048165b66bdb13d0d7803e6eaa23d11adf9. 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/USUYG1462324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743475cbbb8cef98c8cad0ac213489467516ea134ba5a3955d3b55a0ddfa68a4. 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/USUYG1464959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8795c82b1e178821649545c37bee10ddbb6cdea52a69cbf9084ff803f6016f. 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/USUYG1418763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948898cfeecd385f57b0587c2d009f8600c96ffcd6d48ede7a50f29babdd6500. 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/USUYG1462329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc6e502f475ae0274433bad51126f2f6f949a4937f29f503a141799ba0c475e. 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/USUYG1434287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccd3d9f1799eecfc0fc556b2ff37548c4adab8a1bb3c1448ac47b54bc4cb6cd. 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/USUYG1429369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eb3a416415118091aadd4d774f39673a8325a3050b631d7e9617f2e38c2604. 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/USUYG1446349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eb3a416415118091aadd4d774f39673a8325a3050b631d7e9617f2e38c2604. 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/USUYG1446349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6837a6211feaaf147ada2d3403367b2bad7a2c670903ed0722ff48fe74922fc. 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/USUYG1448653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c02169d7ac2ccc018767c8f330883dcceb666503e6deba6437092a0ba145c1. 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/USUYG1449071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc6e502f475ae0274433bad51126f2f6f949a4937f29f503a141799ba0c475e. 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/USUYG1434287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccd3d9f1799eecfc0fc556b2ff37548c4adab8a1bb3c1448ac47b54bc4cb6cd. 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/USUYG1429369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8795c82b1e178821649545c37bee10ddbb6cdea52a69cbf9084ff803f6016f. 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/USUYG1418763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6dd015fe6bc1e5bbc97e49937f195d24e16a1e85c74a07db9f016cf79aec34. 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/USUYG1333421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe377a0fa2f9771b9119956ed6bc39b59337aa31d48c6a5a8ffdb1c77ffc3089d. 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/USUYG1292380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd50544864ebd8599eb887299359e1d9b8bac159b90b97641ebfe49a7b4bdf0. 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/QM24S1838007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287e5dc119b8a97fbd089a596916dcd2d073ff90c429a9cb5f26927f4a1b21a1. 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/QM24S1838008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726b98db3a3b3566b92c28e602cda799e7ef29b9d9f4ca04d02ff213fa897b39. 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/QM24S1838009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a00f3e630b38292ca78991e3c9c636adbe91c190317021133029da22d6a5996. 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/QM24S1838010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0175cc5599e440fea30e0916fc1e785601a72c9242b9f5ec9ee13151a484ba6f. 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/QM24S1838011.