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 0xba563b944f5f3830133f6280832255bdf64c8a08768d72b53b40b6ac540f9337. 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/e73bfb80-da71-44cf-86e4-f7151042bd62.json and https://artists.proofprofile.net/proofs/artist/e73bfb80-da71-44cf-86e4-f7151042bd62.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 0xeb573d6582a9f9b4ba6442c9a3bf6c0fda16035e11f9cf99257e5fdc31f0a5fa. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:22:41Z), 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/DEHF61000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8177533a59be8e1862d7200259a52bc86805981fda6cca203a6ffdf0558d870. 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/DEHF61200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa108d462a6b046358d1860702f856cab61b3316e5b2e1234e4f28b35452c073. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEHF61200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe003b616b548e276119890ee94e23cd890d0657639389dce00c6fae03e297dd7. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEHF61600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52268ebfb721f80085d2839f1f748b1642dd63e4580bbfadbbbc9a3c45540863. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR2X41818106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5d86ee1e485e3998d3c88e7d90e04474e406a1d75e3d3a8db7d421e4d15cbc. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/FR2X41818108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa16ed8c1e368582738a8f0a33d6e843ccfe5fff65512710043bd7bee9fbd9f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:53:14Z), 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/DEHF62200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4fc73d08e94724bf1fb7db48556149b8660066d2049d1863638b60954a47ac. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:02:10Z), 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/DEHF62200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41c934223b344a80772b5e1989df5ef936d126d3a2dd0863e7f3931b7c60d2f. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T05:00:18Z), 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/DEHF62200163.