Caroline Costa Subtil, known professionally as Caroline Costa (born 9 May 1996), is a French singer and TV presenter. Early life Born May 9, 1996 in Moissac. Caroline Costa grew up in the Tarn-et-Gar
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 0xccf9f6e29f20c1d03ec435c55adaf5d66b1b5572e2cbd29e4c1c06799120f842. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a525a800-0034-46d4-8119-d452df8970ec.json and https://artists.proofprofile.net/proofs/artist/a525a800-0034-46d4-8119-d452df8970ec.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 0x07f71cab5674e1b794c2e71207ce8ea7c46ce932f9ab4c54a57e136dbf7ca8fb. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/FRZ111100891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a593549f51360ffeac0d6ae32ea7883dc64034179f79242ccfe608d4517c03. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/FRZ111100897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c67e396bb120d0ff6af70b50866eab6e082020ef91c374f2023ccd107449bb. 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/FR7S01600513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180a643ab24d39690fae8ba8dec8450f5e0f75f1e66cc1d02db44f69fe2b56da. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR7S01701100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694590b7c9ef4e6a45bd4f7ee44caa49ff85862ad2cf0d7dbb32129a58e4d9fd. 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/FR7S01701120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc54687c4169e8edb3efe37dbaca99d27d770348ca2cf03ba2d31104fd59925. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR7S01700800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51009fd46a5054c9eb9c06d221a75db78dd81ad1fcb4ab37f697d54048ca72c1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR7S01701160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ca894965cab89eed1b0f3f083f0d0c524a68a4de61990f56683e782afefb86. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:22Z), 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/FR7S01600511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ab8789a7532dfd76cc5e94386c094419dd1b87a698d9b8736198a3ae035ea7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5080900279.