Jacob Charles White (born 13 December 1963 as Jacob Westerduin) is a professional rugby union coach and former coach of the South African national team – the Springboks – whom he coached to victory in
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 0xebf5ae66f62d122ee23e8445ba199afff08d612ae00a1db39d2fe67687889148. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b31e48e7-817e-4e2a-b1b1-8088e0b24ea9.json and https://artists.proofprofile.net/proofs/artist/b31e48e7-817e-4e2a-b1b1-8088e0b24ea9.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 0x5c899b0799e34c70324b7cceaa5057562c8c6b419778d8f44e464df5abda30e9. 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/USCGH0773217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69e5497160af932fc0dfdfe435c8dd91467162710bfbbd94d33cb902497471b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM90779977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc4034f1b288e821971c7394b2c2297fc1f920bd32776ae061c9eb2e3f9d079. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USHM90779979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9416969f55bad100f4249131335797a137eaff1d40141820eebaa8562655597. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/USHM90779983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9374c48515138300b5cb55d680b2f7ac77ff7c8272630c9d504d1aa64c0df66. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USHM90779984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef59ef643053df77e974e15998d47b3686f59428f873de2303542ffdca7dd99. 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/USHM90779985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea27ef628bebd4810f422e768c8c04e37ee7a0b28919df2002a39a3f48a2056. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USHM90779986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9133aa23aa34958c7ea96eb48704b85bf1bb558f6bc19c520b0047a3912db8e. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USHM90779988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69e5497160af932fc0dfdfe435c8dd91467162710bfbbd94d33cb902497471b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM90779977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc4034f1b288e821971c7394b2c2297fc1f920bd32776ae061c9eb2e3f9d079. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USHM90779979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9416969f55bad100f4249131335797a137eaff1d40141820eebaa8562655597. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USHM90779983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9374c48515138300b5cb55d680b2f7ac77ff7c8272630c9d504d1aa64c0df66. 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/USHM90779984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9133aa23aa34958c7ea96eb48704b85bf1bb558f6bc19c520b0047a3912db8e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM90779988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80b9d4930d54da5f42162da5e8c4352a5c713d88c9ea7a0c28d53365104e678. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USHM90779989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8496b097544d593737b910b943bccbe3f7666e32c8a23598062a2350092abe. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USHM21818510.