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 0x9252ef3470a542219e1d7c1c7df9ab5d6fa9be97a3646e6ad188cbf6d5c229cc. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d5af84d-08c1-40e8-b7f1-3e70bfa84362.json and https://artists.proofprofile.net/proofs/artist/3d5af84d-08c1-40e8-b7f1-3e70bfa84362.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 0x8749e74ebdda57e2e9e77e581654c178e9983b3915c718ed73fe4c8e00061690. 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/USHM91865838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3768e6ce35b5b3ee53c90d811d944c5f391b756cad9ea4d00965eb8f1c7462. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USHM91865839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda83eec74dd92dfd1cc4004bc9e6b5fad0874e2b9599c44600e13c41418f373. 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/USHM91865840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37a9b5dd2827c4db2922fe7f52a6dd62b5e9382a0754747ed58c0ba847bb2fb. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USHM91865841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf98784feadcf3bd3fd5489fdf2573e1cc4d366328cadee9f1f990e7427f36c8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM91865842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7861d979dfb57bcd474bdba030281d97e86865842a26322343c087610d2883. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:36:33Z), 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/USHM91865843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334fd03f70ec2cefc94332789501f303727870388e6e4c7cd226301553935e13. 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/USHM91865844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921539e8f2db83ab8c942f930c81523461f56f5369789ce07ef7d3c7fafda3b3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM91865845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cf662eaf76aef33c5deda39455c7670a0f84408b6fd17a28a0879a76b31533. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:04:01Z), 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/USHM91865846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d0fce6842f2586d2076adf4d1135972ca6ac4c59f600371086b0f282df8d66. 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/USHM91865847.