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 0x531e5461d4b17bcf6ce727a2bf7c43ecdbf7d40b8d52377de2a30afe464cff38. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08376674-425a-4d1e-a5c0-7890189293cd.json and https://artists.proofprofile.net/proofs/artist/08376674-425a-4d1e-a5c0-7890189293cd.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 0xa652df64e6e43324c0118527daf47e3a7e1fbe3b83bf314bff14998d39d1b2e1. 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/QZK6P2421397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e545ff3514f7acf56fcbce31c5334705f0b6903a8192472af52194168543117. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6P2479047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5964700e0eae6bcdf6f1132e92c04f604ecabdc80012036345b50f5815e8a5. 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/QZK6J2429622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814eae3500a48dffdf86cf3d8d8bcd358fa7e3a536a2157486f1e832ae15996c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:38:21Z), 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/QZTAX2429785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dbf5a2b75afc418789f8a08e4324ea57f507e425d91dd6b791174627ba6336. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTAX2429787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4132c440aedfd14ec07d573b3c3f4d6acca184c731cf989c33dd766066c6e1a2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFX2458314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813d9b863423a374c59d6b89b1ad1570f5f5f0f67f42b56ed6fa20be69c1cd91. 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/QZES92595706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77551a1aa8dc49a241a8c1cf0a127de63b77051cd32db75dc30d13207056ec4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:08:22Z), 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/QZHN62559550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b68b269611eaa2632542e64f6232d7be7e47ee3dbeb4310596ba8b760cd28b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6Q2515180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0823402b216a66978141592993678334d79cd304f8f747544c6637abd4888f12. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6J2564219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ab6bc977a3dd38f4cad510e20b8c6adc3da7fce792a83f74a26f62c27a3dda. 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/QZMEQ2527458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca36094e6c1f09db0539887f734339bff26295a3dcf480e7dc98cf4e893a12c. 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/QZNWT2540524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006dca8490b4b3b3f985d27137de6cd4306e6c2bd6b89b091b93e6c91c7a5bdf. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZRP52541293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec8015b09bbbbb0f590ee368f05776b7c79a8c0cf05bc264db39e097322f868. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAW2508330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c46137ed6db002db394e4c227a93d0dbfc6381d59bb59f38cd9414914d87dd. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:40:03Z), 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/QZWFH2590592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa8b2a847449280384b9398b98702f82a10872336b0b0fb9ffa329e60c8bd38. 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/QZWFS2579136.