Joseph Raphael Hunt (February 17, 1919 – February 2, 1945) was an American tennis player of the late 1930s and early 1940s from Southern California. He was the number one ranked American in 1943 and w
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cd9d9beffafad1d1f4f01023141992f5213737886109529cb55cf64a62a24e. 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/7d38d636-3204-4cf3-b277-10e5b2e41f75.json and https://artists.proofprofile.net/proofs/artist/7d38d636-3204-4cf3-b277-10e5b2e41f75.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbad10c288c887ba10d6a7d87a9fc9d74eaf065c528483ecc8a9a3d4690c879. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR2X41961069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5a65dd7cba48e49150ba08f54841b41eb5e8c4fe3f220cb17e607c98273bd4. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/FR96X1936325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ca16889c36a5bd1d8b90cccb35b75823899f56cae26188336cdd8c36c1b144. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FRX282090013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293ee3c53df0cb357b49c00223473ae79d476f278d31705313b897a6ddf6db5c. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FRX452116526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305d65eeef02c294a220d3bcc79d11e3eb00a4ceb3333862da1d1a2a646cea03. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKDNY2102975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8461fffe6b3a07e9705f895b7e765fbd8a2fcaae5f5b9b766bc065b9dc84c25. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UKDNY2203145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f76510e6bc1fe74a2dc1ab3456bcc1b97d730699d941198f17f8d3be15f2f5. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/UKU932360472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2e9fe42f65cdea85fca529b78746c09301310f57d360f37f94d160e8fa5e10. 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/UKLZ61800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2e9fe42f65cdea85fca529b78746c09301310f57d360f37f94d160e8fa5e10. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKLZ61800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cde5950d2d448bedfbfb609a79f60381cad24c6f05e1855cbb83820613d036. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBARL2400991.