Brent Mason (born July 13, 1959) is an American country music guitarist, songwriter and session musician. Guitar World magazine listed Mason as one of the "Top Ten Session Guitarists of All Time". Di
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 0xb2ba47692cdee91f04846fa88e6d686d1ca4626d02eecff8a6ca952ba1d70dd3. 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/e0807fdc-3840-44ab-bac2-5a50a30b5a5f.json and https://artists.proofprofile.net/proofs/artist/e0807fdc-3840-44ab-bac2-5a50a30b5a5f.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 0xb6508ecf7a0784f17d04efff636c36882f7202d3c68cbfb6d054e279b0507c0d. 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/USUM71210972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d19d88c7027c41c7f83b16b3f6de3076e55d14bf046affe1bae56dbf1f8b7c6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:52:33Z), 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/USUM71210973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbdbe8a8b5098c071fd9bbfce3cf917c355444188f4817e4129a52dcd99e473. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T16:01:21Z), 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/USUM71210976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efa94291b94066a557957d256ee3fe559323b89d89ecaf7de72c285ae7c9966. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USUM71210977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88fae1484ef614879d7d8b4b50bb526737792c29805db49f79e02929fa0d7e5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USMR19787132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5775d2a4762841dce4cd740d184ad6b2b9c8370b7ed3c381a9706d85d68a7cce. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/USMR10300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d67e99df841ca4dc838c75e013cb7ff83843f1b0ae6c6f54d2657c08523537. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/USUM71210978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2602e5f1131dcc9d76e0da79fc83b5f76537de4c6fb6cc511eb55672a27162c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USX9P0710672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3ea664c5c93bfcd2b258a54cbc18eff9d804af35150721a483d091ff80cce1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USX9P0710673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b01e31047f3bdacb1f3696a15cc0e68ec0644faa2ee2eb94b73d64eb561cd3b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USX9P0710675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3655848422588b2e26ccb1aeabe19e98784eb86b16f4a6b890971bae45b088d5. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:44:43Z), 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/USX9P0710682.
Cluster Pluck (feat. James Burton, Vince Gill, Albert Lee, John Jorgenson, Brent Mason, Redd Volkaert & Steve Wariner)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b909562e63da3832bdf86930bb532f46dc97a7fb56c2ae0e0552a86905eaad. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USAN20800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9c18ffc16a615838f16e6175acef348eb3955d4deb528a787ad99a8dd11924. 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/QM6MZ2146443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5a75253a90d1da75b2d337a43ead6320e94db02daad54884f33d17b9895f60. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6MZ2146440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290e5b0532e7486559052f32cd86905c0e4dd63914fd79e60830f44c7c8b4e8f. 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/QM6MZ2146431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1765cbaf734f0ab168af46f05e607be8beadb427ce19643328390eaf3c5e49cd. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM4TW2191429.
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