Tom Hall is an American video game designer best known as a co-founder of id Software and designer on classic titles such as Doom, Wolfenstein 3D and Commander Keen. He has also been the co-founder of
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 0x692a397017ff74adbd68efa5fefd38400e0136c7ef702fde46343b8f318f130c. 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/4d48fa86-f1e9-4203-b06a-21127602caa1.json and https://artists.proofprofile.net/proofs/artist/4d48fa86-f1e9-4203-b06a-21127602caa1.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 0xab8bf0894ed251c057dabd4e6464b785c947b844c771dd1c623a399999d37adf. 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/UKZJ72200411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ae3d0423181bd83a44425196194e3ea2f53bbbd406023dfdfce190b68f024f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:51Z), 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/UKZJ72200400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0bb9085ab1b61c5ff2ff8a3f1e74c53b6fdae178961bb78e4b08943c7c20b5. 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/UKZJ72200398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34517ddddef5479f01eb1c26efc709722b13d2cfb36e0df1f6638507bb84492. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/UKZJ72200399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c258d2f0be0fa54a2d51df66c02260b1a20c1b63e913e8aa65f941da0ec972. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/UKZJ72200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc57a6f5f5c413da330fe3f6492a5dd9f9387af8f128dc93b902d51d0315402d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/UKZJ72200403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3402e99320e3685644454862519ab52847b02d8e86985c832bc800fe46a2c3f4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/UKZJ72200405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd2656b8e7915ffe987646afe2f9897919a27bd4a78b3659f21dfb158499cde. 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/UKZJ72200413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d875dc3f3ed4c34aa472d68ba2384b47b97ff1244a686bf1fec5313a384271f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UKZJ72200406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e81afc2b1d21e648cd8c5a78b2f00784706754207cb3af52021778ca877b3e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKZJ72300793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94244b1c0df777dadf7b149bc7ba07cfded0b56fd0fdeae1ab1c2a7fc96e9ae4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:35Z), 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/UKZJ72300801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62059c2043338d25b913a5a443044656b292ade01c31477ae23955f5703d6a82. 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/UKZJ72300803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24db400241be7778bb02a89119c2e8440c94c1f44b40046432071ee60e43655c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/UKZJ72300795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcae6f60010f5679715c9187bfda8bb25fa12761447ff38bd8f22aa77c94716a. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/UKZJ72300796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9d2f10a3bdfe10d3efbffdbf818d939aa9c0b129d62d80baa359771fe1ed2a. 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/UKZJ72300799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f477a4a3be43545b1864327eb37d4295777dcba15b1ff23ead7c3e8dcf0171. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:35Z), 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/UKZJ72300798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659629c153f9312752ae423b4c2cfaa4b3892d777907dfca433d5f44f5a71c79. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:11:27Z), 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/UKZJ72300802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5daa0f45b9511afa502c8e6bc116dc82f30ff2ef85f8d3e5388450e39f104ab. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/UKZJ72300807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dcca4ff721287f719d35f72456d20f8543da78a65390ea911856d0ae61dcee. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKZJ72500525.