Mathew van Vooght, known by the stage name Mathew V, is a Canadian pop singer from Delta, British Columbia.Grace Kennedy, "North Delta’s Mathew V set to release debut album". Peace Arch News, November
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 0x9059c83ff6513282ace1140b7d090d9b6016f5c0b13636c9912c13dcf12b8a54. 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/4e5aeaa1-016d-46ab-aa59-f3124bb377c0.json and https://artists.proofprofile.net/proofs/artist/4e5aeaa1-016d-46ab-aa59-f3124bb377c0.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 0x14f6b71c4858824dfc85ccf301c5f7ebff8a41c14405cebbfc9e1b26956e24e5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB2LD2210097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef71d4bb4063ead2cd5305bff165ba2a3dbfafd3de309395791279ad27cfb1f. 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/CAB391701868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d2067fba93b824afeb3c5b8b92d7e39a839c3dbc160f743305098716779f86. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:48:41Z), 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/CAB391701827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb6b6c216922c114e55fe1392c10d93d222a1d72fd752414b8761b32f0a2c7f. 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/CAB391701855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66499d67ad3e7ce2a3cb7900c676460be6a4d0fd4f2d07e2db7f5c9b8ea88cd. 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/CAB391701871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7626d3fbb95d14add023a508aee9502acd4774ec5a43f968f55c6dce47d79d. 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/CAB391601691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb50b9622150b8bdeadbe63fc0ff48465282a6d29075cd0f04abfe13e4159df. 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/CAB391601693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9268364b74c9a4f86f94ed62cf42f6edd3ba9e8d2ca67651c24a475e81dae86d. 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/NLT2H2200722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05289536c647d369188ed589275d23abd94f1a78b98995bacb49e9a81a210de4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2200347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1018dfe9cc6536acf624c61f1fe56fc9c47a17d100234b4492ef2f4f7d8117da. 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/NLT2H2200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0978bd9fdf4892779d0f7b73909e9b17a675560c0fbb3635b565367c84c1a4e9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DK4YA2276801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33234d4a7dd04e9c5c5b5f195a67604e089e3f2af94461a43e1593378967d011. 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/NLT2H2200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bac725c1213e4a44a965626d75ef60bbd09c032b1dd8256d11a9170ce90a96. 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/QMDA72148202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57045f7b0f8ee973d322715a78dfa8722e34dba48d88234aabf0dd877f311a9. 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/QZRP52122357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0ea180888f5e65aeb52f06f4be1610b203ffd262f1c2bcb3fc1f90db743ab3. 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/QMDA62162543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c3b0e6cc532c51731efc3d781a892f56cb700e9e24cd048c13fb26ad5973fa. 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/NLT2H2100903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfcaec258e324c504f9d548b735156916c51b0dc5d6a562c7460442c7dfcc8f. 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/QMDA62142948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbd110e38e30c06b390e5d402b9f7d5fe8b4d3aed0168965f961d5d5ce64ab1. 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/UK4ZF2100346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500770bc72ecd537cdc9954b917c572398335488b9aecd7f55a43b9422f759f4. 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/QM6P42153359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fffbf71dc43069a7fc40bdbbda04e1bd2b2505b8242f464af60b8109baba676. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2100487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23c7ad691ac7a550cdf40fae03f8e08987f58a851edea5f29056ffa7e8c759a. 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/NLT2H2100217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb88c61193bf967f8e183569e52b8e303a23b1557366c1564012a5e60dcf9131. 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/QMFMF2046206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe37faa50c65856433b8cd70a077f6d942772f8172ecf4ee299ceec5ec4a71a. 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/SE6QU2000301.