El Jefe (f. La Jefa), a Spanish term meaning "the chief" or "the boss", may refer to: People Rafael Trujillo (1891–1961), former dictator of the Dominican Republic, nicknamed "El Jefe" Stéphane Kon
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 0x6b1cfd2958425ae6e674471127d50fc1b8a207e334263eb8c5cb2e4d8521e9f2. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1454e57-dc0d-448d-b889-61359cc47b0a.json and https://artists.proofprofile.net/proofs/artist/e1454e57-dc0d-448d-b889-61359cc47b0a.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 0x65cb842721cab8a410ff405b2d7748d32e3b544e28abf14d5d607a535f91d506. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QT65W2592879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072e2d4bdb9d342090b90e54a0176a0e6762aefce72548d191eb2bc512315b03. 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/QT65W2593005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185ae65f88421d1ff11bb303e60039075ab179ecf6256845302d5df94fc77946. 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/QT65W2592836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32befde0cfadb1afe9a37cb9128fe92c5cac0d5ff1879c9ac7608704c0081519. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QT65W2592852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f18b8b6d4231a352b36856b5e6330c944edf506d60b385d1216e477025fbaa8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT65W2592814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf950bcc7573e9b601cafbbf322d7346eb597b8a277caad73c5bd8c721522369b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT65Y2556526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd52597a6571a063bdb48c49ffc799c1e60ef06e9425a60b2ec8284d60d3bd29. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QT65Y2556575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ba404bcfa279e57699e1749f8f537e46fd3fe9871fe3dbb801b0d577e24fc6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT65Y2556696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab30d8228b5781dbde38f6a4db462eaa60447d66c385d33212f42fd82a9dd441. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QT65Y2556554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a09a62e92bb9157e223610627db27d6d2938b794ad0e3354f0552d5d26f277. 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/QT65Y2556629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f58f2acd2427138d2738f1c27c4c78660d5c1ee1a6aa8abc18d422d0395338. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QT65Y2556679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c916913e5f561064d2f35013ee27ba42037dc4b96c2948f4e2fb02c81a2d9e. 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/QT65Y2556510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28301d1669d17b834b152c873c9ac2040ddf1d883a42e66262d552fbc3df00b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QT65Y2599419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798735118c4ae602ac14f66bdf53072bbc2943a2caf3a6eaff312028bce193ac. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QT65Y2599515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebf822baf02d0a51d978129538093e8ec22a0f0bf42da149c4b2f880539e6c7. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT65Y2599485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfac85009cdc5f70330d74161018662ed6dfe3cc0e598d9413a7e047c5ea901e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QT65Y2599449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3f12a43d070f46f704d6551d742adcc0694f8735809c489f96977a8dbf0333. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QT65Y2599565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5335c15825a118ddd4885a72d54f9671b7c59b9f64ae6a9fb1ab1d97bda1264. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QT65Y2599460.