Captain Jack may refer to: People John Rackham (hanged 1720), a pirate in the 18th century Captain Jack (Hawaiian) (died 1831), Naihekukui, commander of Kamehameha's fleet and father of Kalama Cap
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 0x4acea574ea0fcaa13d43a6d32f4be4382ba21e1e63d9c10117df5a992abbe76e. 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/25a26a89-3d0f-419f-b96a-7f775264d776.json and https://artists.proofprofile.net/proofs/artist/25a26a89-3d0f-419f-b96a-7f775264d776.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 0xac95a7745c23d747a77d0d774434b910de5f5a8765c88cfcd986cd5b25abbd2d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/IDB832304157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf2b1b4c6b4c0d991becb6bb0f427c5cec4fc21c42ac85cb6a28ab74158d47e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR2X41641088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ed92638e2fbaf07d07e1804313dd1342e6d27bcde5cba33aa755bf5bca7a12. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FR2X41641090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56deb6a77211bf3dd3ce727ed138fd738b626fc24ab310b878f52dc12a747508. 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/FR2X41641091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5355936894e85ba3247fffe9fbeb09d4c432c8a48e9d32fdbe21877f945ed7c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FR2X41641093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133bff035c6a110b19ae11d5d9b091e05afa89752dd0b73197343fdfce94680f. 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/FR2X41641094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8c426dd416b8d381d8aeec3260278de64ca10292152fb0d5012d00ae39194d. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/IDB832304137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81698038f87d7740c11b1786ac7af1e78e28acffe038dac6b1f77bf628080d2a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/IDB832304148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48514ce823965606a5c1c889647665629407045a2729e5d91cb720e5b2e58347. 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/IDB832304149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadec620080f697b932b78423fbfa57d6d0b914e0f2eba3ef70dfb7685c6ae354. 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/IDB832304151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b4e02829e7e10e7a3d760d043cd45b31a87b934c818eb7f7bb311e424a25de. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/IDB832304152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb6a11fd1050efbd5f4438c5069f280bfd2a6e1d9837e3986cf19346ac3f6c1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDB832304154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d6417a472de50924be7366eaac2e5b114ee0a5825a23f225cf7908ee80f32b. 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/IDB832304155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5100fa8a6bed2ac55c5be1191311404d529144cd2da4ac960f217b30559e6193. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/IDB832304156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe65931f3a0109cac1ac0a32196500d5179566b8883421f1d87d388366b183ec. 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/TCACO1618610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4285e158eb6f22d2052447920e93958771518b093fa24fbb5d022192ad9680a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FR2X41714578.
Rebel Responsible (Live at Rebel Responsible 2014)