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 0xa13719ae9a01cda3a1601af909f8b91aa9bf40edb48e1710f0a8f1cdd604dc68. 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/e56aec19-3f90-46a6-9f22-83744b48b043.json and https://artists.proofprofile.net/proofs/artist/e56aec19-3f90-46a6-9f22-83744b48b043.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
屋久島 ナチュラルサウンド（自然音）
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 0x871005d3aacfb38ee3920ccd3822bdf3246e2ad3f50b720ee74ca16d7c272b4d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCJPG1731715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafeb154a1db1c512f3dc1d68e68f8892f40083ad81fab3b30a2aad7ed9f8aaae. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPG1731716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93246923f516f010a86a4fc50da4b53b046022c517bf046f1633fd26024032af. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCJPG1731717.
癒しの自然音 石垣島 自律神経に優しい波の音
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c39e479c42778f294929e079305befd7f2e8c5a4bb61bd22cde9535421585. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCJPH1808899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4298407dfdc15e47113c25b702991e6781c3130fb53dd49d581c542cbfa70e. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCJPH1808902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50820ac892c4f7009e75efd0c330b27d63db30ba86f545deffac4e007ea627f0. 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/TCJPH1810341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0ffd2d7667c6ffb8411c72f045f152b82897b81de408be4265fdb046bfbd10. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCJPH1810343.
穏やかな月ヶ浜の波 -トゥドゥマリの浜-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492156136ac0280c953a434c74262f4796871fb571eca6344b03adf213d046f6. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCJPH1810344.