Matthew Mayfield is an American singer and songwriter from Birmingham, Alabama. Originally the lead singer in the group Moses Mayfield, which disbanded in 2008, Mayfield has moved on to a solo career.
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 0x363a66edca69637f56f360b775425a85d21a3249c19e12efff51d000f8804b17. 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/f25bab87-4197-4161-b9a8-5d97a1e733a1.json and https://artists.proofprofile.net/proofs/artist/f25bab87-4197-4161-b9a8-5d97a1e733a1.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 0x170ed8019332a51ad9e5de705b4076a3b89739cb278ee7d4f1eeafb6b4f2b797. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USTC60837464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a7e21f58b8e88a57ce1d464ecafd4fbb46333ae3eeec135850b56f1d582fda. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USTC00939360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa089d3f0e904ccc0e0abbbd37adda697883ca46c480ab6af950b0ee7a9a7adbf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAAW1140560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712465ad2e8349c670d7df42fe0ae4e2d7c5cae7912156baa53fab1c174b6d66. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAAW1140565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6c94b29e3dd9076d993c462e0ac0be7060fbb8f36b6b58a589dad799ba87c1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QMQMK1277772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf300d8045e1267c1d25def3f9f0d68a814b9584e17708611f023f0a354de4551. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMQMK1277774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ece5c0effe85dab771e9914663bac1e23587a61ffba43cd627a73c99375fcf. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:38Z), 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/QMQMK1277775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc903a6f3903089d9bcf102289a72e00008cccc0b1e4770f19cc6de98d90a349b. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QMQMK1277778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07f0c2ec9b330265e1c280efa29546e005f0f5c5eb552bc40662681cacea9a1. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:47:49Z), 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/QMQMK1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a88263164b7c2860ba199a7c6c2daf67169d487bd4d2c1688d67c349beb13f0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMQMK1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e04802fe4141c3369e0534bafe1a8db3e4922f24802bfa483c7f31cd66ecbc. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:32:29Z), 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/QMQMK1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b37135b2fff9a215cd16976c01eab40e89847ea136a87c3403947f2dc7ca28. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:26:07Z), 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/QMQMK1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4a5e0890969a96cbce57c0ad062647650b542fa44bb6f42a8f5c187a3e291b. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QMQMK1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb506973657f948481b9b5fd2fc836d8ede00915dede58fc6c65c905a1fbd0401. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:25Z), 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/QMQMK1600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006b5d7c1b0ae86bfc9c41f0bfc3a695fbf88ff44fc5a91fca9d459ca270e88c. 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/QMQMK1600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ae8398be89247da7167383aee5982351b6e484608c76260b0eb1895e68a772. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMQMK1600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08788f1bc3c05edb3918f0ebc37ced5cae72a28be2ad4bfbb3e06290395d628. 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/QMQMK1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999a717beb7831fe81581133bca96f74cfaee2d8f5350fd473a87289e86574e5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMQMK1600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74bc9aed12ae1eae5e19289b4a79ae978878b7030c775df39d8a62d8a6ac644. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QMQMK1600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6778e45261dd3a4d06873276b09e5d6d3d98d1ef1cd4292d164ea44744730f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHX2445103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8abdf8d9a0cf30da18559cb7cefd219d87373693ae81864bb6ddfd5c90d85fa. 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/TCAIC2451119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1550d40fc51ea95201eb99ae4f0ac14c71479024352b47ad3c62186d8bc3d4f6. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:51:14Z), 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/TCAIC2451144.