Matt Guillory (born January 16, 1974) is an American musician. He mainly plays keyboards and tends to write progressive metal. He has often been compared to the Swedish keyboard player Jens Johansson,
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 0x0c155b385d36349be432d31d0179788543635e83a9d21b2173a6faac3d1ff309. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb998d42-7d1e-405b-b4b2-8fc84a741719.json and https://artists.proofprofile.net/proofs/artist/cb998d42-7d1e-405b-b4b2-8fc84a741719.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 0x7fa1595dbebdc9e878d8df38344ddceadeb823c5f2a1993fe59e1f0c2315f512. 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/US78S0507602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1983e28507ca0576a63395c09997cee67764a77f13b15b93c0d66404ab0114a6. 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/US78S0501008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11904d0b18cca2de19b5da09313d486cd36af58a6623f8979dc412b3bf4711d5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US78S0505604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2250d5e6bbe5f15c6e28a0b6144000280e941894bcd924d6da8f4913201700. 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/US78S0505610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731d0b9f6892fa679eaa34f610dd2848ccd0d43265f51d2cc754d44bd76bc5ba. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:20Z), 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/US78S0501010.
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 0x2e4f5865b7dea57f502354e1417af7e9220c2e0976bfe1dfd25797a1e682acc8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US78S0505609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd846c443c4ec536e01ce917af488f33bc0b32a9fb133012c53f8c6fe9a1d49c0. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/US78S0501011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a602562d50fbb8f3a3b13f392df0dd36ae061143b539e30c5e5636e9cce205. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US78S0510606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4516a78990cbd0b2046fc1d6bc534099491aa631945a30118b87bc7ba6a578a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US78S0505601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6871fb597d86856ff8a6c498f2654e53feb1e2f6834848571768b5f84ff86b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/US78S0505602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b865c680ea1a21d58c27ff1a751d93494d8ebe1114dea2083d06dee845d8eb. 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/US78S0505603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dd09c89d5048ca5a91252e07cce4198c323a0dbafab195dcadc94481a21048. 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/US78S0505605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8117a2123eef81baed5d55355184e622e13ac522325334cdc5a7ab839e1b590. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US78S0505606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea29005993dcf80b7610584edab46e260937c3d1bfb07e6c54d8b4653c5d1bf0. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/US78S0505607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e79dfc1f0772ad35389e54fce87e6f6ed02f0ffcc6daa69b7de23efb09b8d6c. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/US78S0505608.