Cap'n Jazz (sometimes stylized as caP'n Jazz) is an American emo band from Buffalo Grove, Illinois. History Brothers Tim Kinsella and Mike Kinsella formed the band Toe Jam with Victor Villarreal, and
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 0x443a51b471a11565e3aca321d355a1ad4bf967bc3f9100a5d6a1207468173e34. 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/961609ed-1faf-4c24-a200-8308bb7db87d.json and https://artists.proofprofile.net/proofs/artist/961609ed-1faf-4c24-a200-8308bb7db87d.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 0x67f57647dd9c586bca4e5f5cfa7e4e1450f2f424f97b0959c9219d70d69318b8. 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/USA6M0403601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f0c25eedf2b1b6243b5f034a46cdc7325091e74a6c061b25e6ec1817c5b2f8. 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/USA6M0403602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d4cdf0ea29fe7e76567000436fcc641532fa3e534bfe0e977324e2c4005ba8. 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/USA6M0403603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83d4f38c2b5e3504031455c059fbff520c753616fba5f7292a6e234c59c1684. 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/USA6M0403604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5818e03ce7a1b5f157a6fc1b114a46930c31c5bbc21be7651ea0feba8a158c98. 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/USA6M0403605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf2fbf35bc3993ef75c59ea54f50cb80fb67058f9d27fba4d739ea751263478. 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/USA6M0403606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7391c48991e42b0e6ab7873d64a9596167570fffdde1b59dda48bc98b75259. 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/USA6M0403607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202d473e049344fff07c1ba1ee642e25c140d015a2feecd96fd5c3345ef9b3b2. 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/USA6M0403608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0bf5364f4627ca270d3005936fc1c988e712562ea1da2d677d93cfc6b21b39. 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/USA6M0403609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db74af3120a3253a0a53bde0fe8c750ed20818960cb2f5089fa9b96c3c38f17. 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/USA6M0403610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d99fdc56b2d6e088536ce981246e9deee5149cf43637eed8aaf4ea13555eb1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA6M0403611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e691fddb7cbd10279220dc29b9cad096eeca0f60648a45e62c0589f4ae1ba1a. 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/USA6M0403612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0f54b8406fbe4e8eee1b93b2a46b2f4ae9a2d67eeb45fa0b0d96fa0141f6d3. 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/USA6M0403613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a944b5fcfed40a41f90ff6d354e53fef3e758ca06ab8dfa13ee28c3fcbd8422. 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/USA6M0403614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df99c004f7dcaf9f9738a4430eea81d2adec48442eab56ba0e694b532600ef2. 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/USA6M0403615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6698ab94664d680e566d60527bc04a63b3dda6775f3ba5e6b4eab966ebc6f6. 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/USA6M0403616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63bf66b907c2b0cc6a64adff36d4ae2a76433b03bc8c6dda0f13c5a4a812cdb. 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/USA6M0403617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c502b5149e868a1e68bc00b00ae8859db54ea0ab946e20cd944eca6b43a9b2a. 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/USA6M0403618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bca0d61356900afb00310cfbdb04aba4ee61f214256e11bdd8bf418c770b7a9. 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/USA6M0403619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336db0ec8260d839713dc20dadae942cc623fb83f44522d4f2ba14ebf5764a43. 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/USA6M0403620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3c404feda23390281653776e0245545146a3ebbd2610f7aac24e5ffb134023. 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/USA6M0403621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fb7dbe3532b16f4597052f05a6c7f0c67a97528a1225832ded300a4399bf00. 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/USA6M0403622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6132df979f12b0d8900a40b56e3ba633f7aae18d17d5f4a6e95652fd34b65174. 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/USA6M0403623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb79356d6f21d34d17b8799ecb7d4cd60c26ea9ccec4ff21b548d31cdf67b4a. 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/USA6M0403624.
No Use For a Piano Player When You Got a Player Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc6dba0ea35fab0fd3d6626b15a8b66c78c58c4b110632b6231eca9453df095. 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/USA6M0403625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ea2a01cc5de65efeea24d8fa859b57db5fbde73147ceac5670c6296a661187. 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/USA6M0403626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d47a3e1d1ce83a61ba903d5e15c3b4868611c01e6136494f16b4289af8135bb. 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/USA6M0403627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e9046c39ca6dc900d47cf37a4485bbdf0647c5c0939cf876e8a4f723b3e105. 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/USA6M0403628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2023e01d68a0147a8470404ab573c25eaed42341e9ad37572e26920b5c9198. 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/USA6M0403629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92c45e00af281810a128dddb82263f1a1650d14b19b0ec0cd480c62a22f2c93. 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/USA6M0403630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1209bd988334cba7adcfb9ed1759c5e3c6060319a68d2845413b7d377c0c14ac. 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/USA6M0403631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf337ddee31b790d4b70be7a429bf07b761077889375ab7f6941471fe6f703b68. 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/USA6M0403632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e212bf7b9cdc24bb626b2c5ee1b3123b28f4f6bd8c31923951d803576bb1f49. 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/USA6M0403633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd940aaa817636be24c2f35a6ed2788dc85c52b58c1e1fba338fc1a9c59594c71. 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/USA6M0403634.