Marvin Augustus "Preacher" Franklin Jr. was an American football player and coach. He served as the head football coach at Nebraska State Teachers College at Kearney—now known as the University of Neb
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 0xa664a1ca9506427ef02a02e6f39518a86ffd3b1d6e19583d47a5b3c50b81f918. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f554d8b-9715-4068-8bc6-b3aa0e5e6f40.json and https://artists.proofprofile.net/proofs/artist/3f554d8b-9715-4068-8bc6-b3aa0e5e6f40.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 0x2e8d29877d795d87813e7ac99359b388797afe1de257199b7c7cd105a3eb1fa5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR8GV2305240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5345c60558e74fcfed4182c7632f1247c49f9a148530904031931128fb102fe4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR8GV2305340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf942f863a835715ceadef6fd26a0d836e70969737c0d51ec65b7400025ab859. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEG931591442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176756409f146b00d3726c6de785f5f4dc04782e120d1e4dfa008cc201913033. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEG931591441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461cd7289189d2f2c1faae256af6986fedeefcfa2ab38ace10471884b699320f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEG931591443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3291f0cd096afcc74b02644ad5f18b426949a6ec2cbf250533d929be1b32e4e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEG931591450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3dda39f65b02a083a982b2046e5ac3d107c21f9b031d33d70b4754e5124fd7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEG931591444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa33d0354086bc164618c56fb808f1eaa22a56ece1f9cf82b2a1ba1c0a69b3f1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEG931591445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a7f74bb2b781f121ca8f1dca782593d119ca2999a6811781ca6f01b2d51b02. 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/DEG931591440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ad90f4dfd726f683e4c372d92bb8d6b4a3be00122578e6e5a1ba7aa5ab459. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEG931591446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c09ca778ccb667c6285e259029952f79bc6ef13d2838d95cef6358c69c72026. 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/DEG931591447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88160b3a8e7ee91e22404952cd8ce0a9549a2834dbabcd586ebc36c23f710d40. 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/DEG931591449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138666a5c77abd3c4aaed09a0c8fd58103ba992f90e7e527e3885908409d87b7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEG931591451.