James H. Mathis Jr. (born August 1967), known as Jimbo Mathus, is an American singer-songwriter, guitarist, and member of the hot jazz band Squirrel Nut Zippers. Early life and career He was born in
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 0xa93195e94c7b82333cf016271aa4b30c43fb86cf4d8651e1696aedd9f97a3a4f. 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/5bb1a028-d0d0-433f-b9d4-5b3f9d665545.json and https://artists.proofprofile.net/proofs/artist/5bb1a028-d0d0-433f-b9d4-5b3f9d665545.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 0x5b94a59c7b944ec3a5964efd2a34eebb1a5c804211a983c082c0036561dfc3b7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USFP71440712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde31b12716760bde7a08ce18ca9cc59253c7b2255cf6b1a91792a2c7a68a8e2e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US4H72100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aa99421bddb84a937c186aec79ae55986c6a09f7d5fbe13a86237fcf7beafe. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/US4H72100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfc45e4c8924226265e0d7cd14961504482bb3c289b2a4912254def76ac7f20. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/US4H72100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeba9c3ec11383441d613458b959bef9c6472e70eaeb57fd5c596aabfad08648. 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/US4H72100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1244ced5cc3f965a4c53df080cea43aea9758d8272967684fc3be3cf612be713. 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/US4H72100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944387f919b7d544d369a386d42b36d4f34c827e5cdd9f129ac9d8554b016108. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:11:12Z), 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/US4H72100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7e1e705d1102259e2f1da5de3bbbaedcc32008183ff7c4d91bb1f8f4730886. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/US4H72100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0ccc3f3054452d570cd84b38c48d8c2899db7ef355b4c3f26519bb04b10a4a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US4H72100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68d7b600526b7c72c6a3d7913ee1098cdaa50e0985c7e30737a7458c52ca99d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US4H72100012.
Live at the White Water Tavern Vol.1 Saturday Night