Matthew Tuck (born 20 January 1980) is a Welsh musician, best known as the lead vocalist and rhythm guitarist of the heavy metal band Bullet for My Valentine. He is also a guitarist and singer in the
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 0x812cee0b8c7141b796cb89238c3ce146bf7416684ed8fa9a49fe087f9082b0da. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c334a322-a637-402b-8068-728d90318bb8.json and https://artists.proofprofile.net/proofs/artist/c334a322-a637-402b-8068-728d90318bb8.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 0x0f3798dfa35685a2fcb0d48fa70d924c3917d42d74b37fd4130a5a15ec079ef7. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TCAEY2017614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0a1b2da1e0116d61a6eda7e0a6cb3b719fdc5e81d91015232d8ea9a435d8da. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZK6H2050143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d8af6741301454b66e98ddd19a0fbd64bf0bf26787a862516f37be047720bc. 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/QZPEW2213513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a0f19f161f07ee1a576475725b011673688dbc0f95f66b142e599732b2c573. 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/QZPEW2213514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cdf0d2938c17a4d74db0017789ae976196e065648589344698beba8d5d4a6c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZDA72110902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd247349c3239d7323865a70005b7a4f2b89eecc0594d49f9527dd72439b4a013. 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/QZDA72110907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c344d2d338f40b301991c21d6c9c0b8fe168704c51619acb718e8590888e0a. 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/QZPEW2213515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5031dab3c7f5caa0c9d8e740fe3561b6bb2bf30505a729e3c46149c7c2429584. 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/QZPEW2213516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ad2c5a45dc232f51fcd6aac471582c00583dacc4f1f2915ad86d4ec73a1be0. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZPEW2213517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5703826638ed322dc442d0fa5a0e5de022c8a76d1f9fbbcbf4febb046ebbb486. 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/QZDA82155936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a61c653e07ea2a415c89d4231d3cc9c3a7a771e98023940b76888ad40911ec. 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/QZES62176185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02967d257b2690b43bbe0e2c8feb61cba2ebf594acb257b28d86f1658060417c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZES62176186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcf5f1e1fd1ea34d5263171bb9e55a341d5fbfbcb5cd15f75039b9f87f4d504. 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/QZPEW2213518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8674ea5db67217addb705162fb3290d94c61380a625aa71fe1ff0af634abbc4b. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZDA82049415.