Jack Hamilton (Jake) Warren (April 10, 1921 – April 1, 2008) was a diplomat, civil servant and banker. Jake Warren began his career at the Department of External Affairs in 1945 after serving in the R
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 0xc87889eabad0092d4487820e0872487e0ba70e889d4d3256e5c65b9184aba425. 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/73750f5f-de41-45dd-a730-a7196b5debc4.json and https://artists.proofprofile.net/proofs/artist/73750f5f-de41-45dd-a730-a7196b5debc4.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 0x6fcc1f39a1380fd7f090846512057be58511ea116e40b834923e1824213a64f2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM24S1915433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239465bdcd820f6843556893a9d2ac5773dddf51422a313bfebaa42f5d052984. 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/QM24S1921839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77aeb8c560cc0c9e89054fcf26f10411b92297b284bed8610fb9105654e5add3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/UKW3Z2000605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3028eda3bfb6baf03ce292983706a561ed29a4fc48aa0c3e6fbb4dea1077cfb7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBCFB2180849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1ad62d65d5b26af33135cf80402d5fdcc234963c07c9eea9f31abdd2f29171. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZMHZ2152289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82b976fd92e29e26927854d2bc687da7bc29f689dc9f55acab49412fa8ae607. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBAZB2103688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a2ad59b3e3a61babc11ef903d7148106b1fdf830cf5b0b03076beb5ae2b43b. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/GBAZB2103666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e5274ba39752ed981434e25ae6fbd46d7e2ad000e29431a52f34f8e35c2902. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/DEMS42109163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208b89bd0a4781cd462f377137d357c5fe41bcbfcc25969c828c101045dc9bfb. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEMS42109164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428faf32b56572e7c79b3377a08850315064094b8f5061f65fe5c25dd70b41d3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHS2377844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05955ff96cbdeb294d1e1c7674d675be279e26f683ce49c6ace21f5dbcfe5e24. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8X82273207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4a2b87e6f796b86c112345886fed59e220880c5340d8428c8f475620271c37. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8X82273206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb747a2b4837b0f77e7170fbe15ce30f604ff540ce0aeaf8c8bc4ef702dba3f27. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBHGV2300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95158872a7e0fd257ea9932f52d3a31f88a5ab8c81f049e197d6d713f08bd3dc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBHGV2200042.