Matthew John Stevens (born 11 September 1977) is a Welsh professional snooker player. He has won two of the game's Triple Crown events, the Masters in 2000 and the UK Championship in 2003. He has also
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 0xcb2e2f93b310713827b45b46b571492d5dc2efb4ce573d50b3d15c637f335cc7. 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/c49a8577-e88a-4b96-8cd5-63d8690fab09.json and https://artists.proofprofile.net/proofs/artist/c49a8577-e88a-4b96-8cd5-63d8690fab09.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
In Common: Walter Smith III, Matthew Stevens, Joel Ross, Harish Raghavan & Marcus Gilmore
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 0xe4b34268a0931ac5c9994062376f3625b5992edeedec1bec49052909031892d2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB4DA1800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5153ea814327879bbd85308e933be26d8daf1bb7a68ed4591ed1f92b716b34c3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB4DA1800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d6ae8f2a48840161b008deaca79c71ed56644aea712380e6d8c26d0b44798f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GB4DA1800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45200e62f1a96bb333d98bd2af4bfc86739d0dc14ea98f842e3ae8b432c93eef. 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/GB4DA1800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78026d106868f6ad5356591d86c8c7f023c1762104741bf872308f6e5241c56d. 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/GB4DA1800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0a1d0d5d8f6b4d8794cc6d2222c7330fe9fa085c06c83ead2110eec5038ba3. 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/GB4DA1800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e2a0e32d739f5afd02afe03875ea212d724eb995b0b59048dd08bf6f5acbb1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GB4DA1800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2006ee59655422eebdc27fb49d5ff0e889b6294ded419b103fe98b1ca728a8e1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GB4DA1800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e344453c76b19bd7dcfcfa9a1c3c284f2d1074fab4496605a4f43df92072d2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB4DA1800121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295b50a93554270c89d497ed7b1a26a094fe15288ff9bd83d79fada321b60d0d. 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/GB4DA1800122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0b61835cb4cf3a6990ea4f44d163d9a95b94cc713215b67703c91f80e083a2. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/QZMP62370015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16192795a57aaf627f613e892def8ebc8eea81c2ac5884a04a4a97e5dc020aba. 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/GB4DA2100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508292910313bcefca14c215c0e9168290bdda8b0f4d2b1e921a87f2fd1843a2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GB4DA2100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060a40cb0bb30f8dde290123abec9fc459c2a29dc67d63e25262080be7f46134. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GB4DA2100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9240add075e3d4583a345238b1bc81af732c4d226670e25f5fe6abc2681f5f3. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/GB4DA2100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46fa347efd9285ea8e596aae13622505793559900d7053c1abdd51b4965dca3. 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/GB4DA2100151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ab5dfac20caeba315e7e8e33e5b61741e8928eb6287128b4dcbedcef44b2ef. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/GB4DA2100152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4e04fcaf0d4ac787755ce8702cee52bb98599d24bd593c40bb4791d64c8c47. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB4DA2100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c767a5ce063c992029bf599c010c55d92ea6b9a7e7e6ed1a07ec4630030829. 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/GB4DA2100154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d532a9d40bc573837c955330c067e2a0430fa78d49ce29a1967e8c726b50a1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB4DA2100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd82469bf9fe05921bb474eda3fca5db9f82801b41acbf9925ee7b71da62ebe8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB4DA2100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cc5063192cfe3b2c8aef21a4aca7a635a0ccf384050ca79afe595bb6f8e1ac. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GB4DA2100157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fc811b07ca8a0a26a0c3e43cd94816abd7979d7a924e105d27a624119f5d12. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB4DA2100158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2c179a3646cce7f5701f02f08e81879e89e163809d983bf68c5211ab853b6c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB4DA2100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2bac8210e5552b270f5ca979cec892a85c71936b8d93195a958b4ed16283f6. 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/GB4DA2100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8243b8028f074b1dd5d4ecf1d327da0adfcea29788cf866276281a9bed862aec. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB4DA2100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fcfa9420a7cb6ae02e66b60f5157c954a962ad4e5c9ff5b84cfd4a844d29c4. 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/GB4DA2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf11c5110e33cec0723cc7054409de88acdaba451798ce29b4dadd0de9c9308. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB4DA2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021cb9d9a69dbdbf4bd40ad016ef8e8ac8e88cc3de05c04dabab25eace71cc0a. 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/GB4DA2000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb792c86eb3aede1d59363917ab4d66a73df986192b4a5bfe58f823bb0199db77. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GB4DA2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61a525ab8001a09ff1868c471e9d2f9f3672e52c82dcc055dd0b6e50fffd6f5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GB4DA2000047.