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 0x0735cd55812334bc3a54a35620b6a88852e2060a37ea36cbc9567e226797811a. 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/3adfd5fd-3d3f-479d-9f32-30f7742dc907.json and https://artists.proofprofile.net/proofs/artist/3adfd5fd-3d3f-479d-9f32-30f7742dc907.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 0xb238d4887edbcbe77b6778e52fbb222089e32ba416d1344225da5fc07508e46c. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USHM21749856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c9d28d108ab2ef5e3c86661fff0a330b5c98ebb9bdcd55f0fa88b76cb7ae5d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:35:08Z), 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/USHM21749857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a642846494f7cf8384e1b2d363c49b6e0ad4305eb790b31dc3a4dcdc2a56eca. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USHM21735125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca26ab08d39f51f910b227fea288107418dc8dfdc228839cda8ff60e0e7fa85. 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/USHM21735129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fba22964789073eff90e1e297ccd8e7261f6f5d0482aca869a40adb6b2e9e4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM21735137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ef994ac44cc1a84a7517ae7a15dd64910dc174bb81b2f2f4aed7f3a3e65390. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM21714242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed39fa7c111c3448005f3abdc1ac8386a61aebb6bb5a9afd2db974ff004388e5. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM91715531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb89e655bec93989332df088b9c0b667cd9c6cd8a587bca842fe85033c367f. 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/QM4TW2475927.