Rob Summerfield is an American businessman and Republican politician from Chippewa County, Wisconsin. He is a member of the Wisconsin State Assembly, representing Wisconsin's 68th Assembly district s
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 0x82326e5ab817eebc3736f2e79bc137725583aa8f325e9840df3604f6cb0f3981. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca2561af-9d33-4f18-8fef-02f2ab61013f.json and https://artists.proofprofile.net/proofs/artist/ca2561af-9d33-4f18-8fef-02f2ab61013f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Never Left at All (feat. Rob Summerfield)
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 0xef1041546d3bc1f7c8edfdc7f74e0ba0ab8132a6c74c4b0dc36eb90e19730224. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEA621700489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caebd14477f15d86d2d6ea9a574dc57cdb8b6c2e066b2b42f7ed78778a5031e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:21:04Z), 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/DEA621700495.