František "Frank" Daniel (April 14, 1926 – February 29, 1996) was a Czech-American screenwriter, film director and teacher. He is known for developing the sequence paradigm of screenwriting, in which
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 0x49fffcb44f6e171908e087c0e7cc27153c0e2d13419355748db55830c5c3aeae. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3381f7c-7067-4374-ae2e-1c01a02ff245.json and https://artists.proofprofile.net/proofs/artist/d3381f7c-7067-4374-ae2e-1c01a02ff245.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 0x83f54f7dcc80e78a8275012898f2b2afd75fa9a1da10156989564547381159ab. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:44:08Z), 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/GBKQU1330915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0075bd26476146aa8bfd8dd1f65a3be638b91ed58507bc8c55e43609a5949e78. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:03:23Z), 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/GBKQU1330163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169aec747dc9f3b29e5671b9a78732f3a9a949a37bf8cfca15a42285028e019b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:31:55Z), 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/GBKQU1332222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897411d68d01d6eb302d2dfddf2c4cb02e475c14303cc94789674a0772dff1b0. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBKQU1335442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7aad9c66ea87a86aad843ff095346e618b16b63c6109eaaf9722f18fa87113. 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/GBKQU1434734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf5fb1055e85c6784241a51fbc23509f657bdcbc223eea620452fcc3dfa8817. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBKQU1471779.