Tom Jack Johnston, (better known by his stage name Thomas Jack) is an Australian DJ, record producer and musician. He is noted for the "tropical house" subgenre, and first coined the term in 2013. E
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 0xb2fcaf9941c7ace70f3e3d3359f424c0ff980d58f04194a742a01d859bf3db59. 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/8c09f71b-f13a-40a9-a431-eb56e6986928.json and https://artists.proofprofile.net/proofs/artist/8c09f71b-f13a-40a9-a431-eb56e6986928.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 0x094a62d83ecae7ffd69bed32f3768a56b5a316e566aedf8608cc2fdaf7cffdf3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USQX92304413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590d38f703048a4eda433cdb70c707811e3afab2fae73535c14602d215821519. 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/USQX92302852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b84851ace6639efa30dd519319fd36edd525f2c7e35e80af6de921f1a9b2697. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USQX92302853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8e4abcf9ae7c7ff368dcfadeb105d1aedd33b3d954da300ecb9ff92dbe5446. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USQX92301686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec8c371ba327342ab9db59b953c6e1731f7bd4329f1151a0a2ef8228aa14893. 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/USQX92300763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe874a6e38b899d2480b2eb45c8abe10288315ade0f840e204db65cdcd6f4a1fd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S2202253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91e24f4b15e6024c136b2c70576b6db3e2fa14ef5637c7ec2415fdd9dc20674. 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/QM24S2203521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c89d3990ada83f5c2f8632f28cb4f112cc3b4c79130eca23388f3a15bd1c09. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM24S2204829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7057f5b07cf60eb079de69bd7e898317bed3407d6865a3e2595e1b2992ef0f6. 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/GBAYE1703215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0732d4757017430cb2468e1dd709322165d59a3abb55e903fed766c6123eb5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAYE1703214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457c72226f29e14f362098867a4d48bef37481bf4ea1ac371b11298e2912422d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYE1601499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65821443eb5376abfb7f0fd7b8e05d8ee3034c78c916ad054840893916b7dd72. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYE1601065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d93d067b753beff58b10e8dba65b588a89b98cfa571ad894a68d4fcc53fec46. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAYE1501052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8681551aef7c6480108068d2cbab2906ba4778fb5db7bef6a0815be486f6da1e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYE1500994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d97778c8232245957bb1e06d63fedfb39b4a0614c70d8df5e7f5b5f2a74d278. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYE1500917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3aea367c111cacdeba7c709a6505337510d2a4ac59cc4471770850bca343c47. 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/GBAYE1500918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813d46b0103b13e8f3bf981c5e84a6ef00623e28f6d891611c56a8edc66871a0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAYE1500919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8157340f04ceed060eff10bec3df3bbf95a04792e3bc42910f524f50b84f4b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAYE1500798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedd58bb1001316e5bfe3aa2ead2b7ddbf49bbc516c1347c7bd0bf60cf1a3f8c. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USQX92301281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd422d43737d2466d16cdc22802032fffe3baf81a551937106f1ff54e815a6a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BEBA51300026.