Tom London (born Leonard T. Clapman; August 24, 1889 – December 5, 1963) was an American actor who played frequently in B-Westerns. According to The Guinness Book of Movie Records, London is credited
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 0xd74ec3c20732c6a873c1a426c0027130d38256c40cacd9962f881e6e39be7138. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80be7248-1952-4bdf-aad8-46d389bd0fc8.json and https://artists.proofprofile.net/proofs/artist/80be7248-1952-4bdf-aad8-46d389bd0fc8.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 0x240b4df0bd8237d57fd257db7870faefec33d3bc2f0d09378a181f1abcbe6087. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAXZZ3200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0c0bbf9875fee7eb03ec1f07dd067bfffe024bfd61250630d2822782d6201d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZAXZ32300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1092ff91f1e02843ad0aec4576f17323c2c286dab939b2248ef72181e6e3a6e. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:32:01Z), 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/ZAXZ32400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e8fa587c26215f7658c8612c3ebd9d386b999347ec567d26ca519f580e8742. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:00:06Z), 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/ZAXZ32500002.