Cheval blanc or Cheval-Blanc, French for white horse, may refer to: Château Cheval Blanc, a wine producer in Saint-Émilion in the Bordeaux wine region of France Cheval-Blanc, Vaucluse, in southern
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 0x666d9fc9e4e63c94812b756a98a9ccf1a366d2e83a26f6cf404538d596e1b368. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a6d9057-7262-45b2-9bf9-1c17fc8413e2.json and https://artists.proofprofile.net/proofs/artist/6a6d9057-7262-45b2-9bf9-1c17fc8413e2.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 0x7a86c3d22ec5bf1215c54816b5e2ebb9c1158462659a39646f40b2e979dc1fb2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR9W12010495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8ead16f1cdb9bfaa1339058e0808d25f019ad8dc835788237c577cf8ff863b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR9W12010496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931ce28e81eb2edeb2a944a90803aa0e56e26a865aa76ceefa2ebbc0ace86fc5. 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/FR9W12403887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8c0a1782f2a73ddd6f7eea74ebf36b06c506fc3342a41346e3bfe5298cd0bc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9W12403888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece20c1ff607575f3bd10d02a189d947d4a132170f837efa908e975bf0c095ee. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR9W12403890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b45ef71ac33dcf1ad20d2d70e2ac6cd9dbb182119e82e7ad99003d44fbfa1c8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR9W12403889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70f3109c9315548e93c4a7fe2ecec781f0663615c7d5211c5c47dbcdf367550. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR9W12403891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c646c0339d0fb88e33c28991afe42da15ddda0f3ed3f34e7a5de69d94b8bc30. 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/FR9W12403892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51be5165bbf432b06012ea3721d3647d0ecddcb43c1e2dd95baca49ac8e7a55f. 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/FR9W12403893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98e29f639b08fb65137ce79d55ea90f5c99c9d2b807b402506b7e42689a20bd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR9W12403894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699bc99b260944330d79c6c9fee572f2e36f203ffe17851573769e2f89f28be7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR9W12511949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5df7a46f7e9031f24f2e3150e71191cb30f86aa89171f8d25a0084ce370a0e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12511950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a76e3e2bbb99dfe0aa347dbdfaf940182168af92d6fb7a222f7f8ffbd851f6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN72542453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa946c5c87004b5b919efe756c834705da630997955654d49046b596a96d71ef4. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR9W12501746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51e76579c81dd0c2de9e25f67eaa6035df21fd810774619b54a3e03b652593a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FR9W12505264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85acc2d4a8f076b0fe8496d39727f65612d5a4cb685934081e71f0b03c5e1286. 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/FR9W12511951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be865ab6cf9b636164fdc9a5e01a34170b6406823b5ea3e2fde8556dab5f96c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12511952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5e4d5bd1bb308263dd66ef0fe88929241e6f93c0a1ea00c310ccceb805e808. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12511953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59283ba779519a742d737a1623ee8a3781f4c88a2d0649d6a1fd41c98d929960. 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/FR9W12511955.