Jean Castel (4 June 1916 – 23 September 1999) was a French sailor. He competed in the 6 Metre event at the 1948 Summer Olympics. References External links Category:1916 births Category:1999 death
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 0x02b1fd7d22c500e113001bd0a0fa43f004de6b5589ffc1292f068952d1cf365b. 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/4b23ec19-d74c-498d-b774-36ace6a491f3.json and https://artists.proofprofile.net/proofs/artist/4b23ec19-d74c-498d-b774-36ace6a491f3.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 0xec2f383154d18c739bf7dca9a92003853f64c66877368703fb34796d8335a95d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZ4JJ1905260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b49c31b744a3a5b21b8f45afade6adc6d0e8342c840e4a7b7748e109ed887b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GBKPL1952999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628ce80610698dd71c9d448a825612a92102b16d4144b852ba273f4780660a8d. 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/UST8K1893702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf86d65fa70d78c96a2f6005b91859c12e8bf9b0e065681bb3b855c12bd9b6c5. 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/TCAGZ2386168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f28ba97b11fe04ad1c69c2725d1f5b15f8428df3d066e974b8ef744c6a2ad7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBKPL2089209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b23d58610fb300bfe9fd99257e3c3479e4a9d207a4565b79422cf33864a3262. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMFME2217429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfd0a158b64c3b2d96f80a22e25b13eddf03012894d6c13a0d6506b623cd46b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4TW2326401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5097266b040bff608f674d065b9b7c23b7d8e8c94139486878a06d491003c6. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QMDA72356760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23046529bbe76f57d9fdb884f2e980bb29dbbeced755528c2742d732acf56f12. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:19:00Z), 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/QMFME2324745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0b8ead4f60cdedd05d86b643be65cb1e8b4d0c3d7fac07b9812ea9dcfcf5ec. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:06:09Z), 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/QM4TW2494725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e3118b9e3493025158c1013432ba27047fba74996ca7b3c3c65fa9cc560ce3. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/US38Y2414812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8f76a39360501a074d621b88244e1a73a5866e9d7ac646b058d31f0734eae3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRV602300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6775e7add5c63300eb71c9df9cac9c95156c123b8fbc38a1e5be9d4e00933a. 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/FRV602300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b1d8deef65bd818dcbf1acd8d2236f1a9c84c40d184edd4d0f7ed320f0e41f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRV602300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792f36ab3d33fc8d8d94fe6720cbec6cfa931231afd94b17ba8d7fe30747e542. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRV602300125.
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 0x7cc447797ae3ab3c7a42145e069f0705f8b666c8a4a891bc2377d021a2c1e688. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRV602300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655252649a0c47d6c8817536e2792e7d3729ec90b75dde6f9fa07d38ac6c2bd9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRV602300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bc82086b4f9139f84385ccf7fd8a3c7d7745f06dbb0b60c902f7e4b94d9f50. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRV602300124.