Paul Francis Conrad (June 27, 1924 – September 4, 2010) was an American political cartoonist and winner of three Pulitzer Prizes for editorial cartooning. In the span of a career lasting five decades,
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 0x67160527a886fabed104c780f333ca013e81a0a0b830235a88064e14d9b25e39. 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/ae9ecda0-6a6f-4736-9a30-788ba0bda335.json and https://artists.proofprofile.net/proofs/artist/ae9ecda0-6a6f-4736-9a30-788ba0bda335.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 0x9004794ade36e9143093b974133cc2baa660de409f57ac1c98290e87dfcfa5af. 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/QZTBA2362761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5a80d6bb6f2e727ef4010820441c9367652a39b4a10105f81755b0a48bccb1. 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/QZWFE2313182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3629e032acb30c0523c2585360072d541fae6758cc8b9717ef21360b7bbc4e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ22421568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53be70f86e292766bab133f937885e9203718fab7f99ae1d18a52520c52ed910. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:21:08Z), 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/QZFZ62410591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba49a4530d1678ca74d7b729ae9bdb7d961438353e21bb23387e27115ecc3df. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHNC2425299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd702bb8f9daf2d783fdb15953cfd7d42472d2eb058144b73515dc1114d2e5c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZNWR2498495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc951786cd1b895ce1cc15d76297677c6addeda29cacff7bb9743dcb987c591c2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US83Z2427167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afe994bd98ac28ec896ed951573c2b959aed49c1041c6e4f9d7674bca27325f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/US83Z2427166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeec763a9ab567fc3675f6d35459e752bd2c8199027ef35005d27c365e9ebb20. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:26:28Z), 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/US83Z2517712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f55cd699a215c74b4b9d16ba164c6fb8eec7533f7463413f001673ae3c11dd8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US83Z2546432.