Josiah Clark Steinbrick (born July 13, 1981) is an American multi-instrumentalist, composer, and record producer, currently based in Los Angeles, California, United States. Aside from his own solo wor
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 0xc1efd15cc77a0eb2aaf532dd8b8379a6eb31f588299bc3ee2b022932bb4781d0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c6e20d6-6ff6-4235-a913-2bf4a7fa2095.json and https://artists.proofprofile.net/proofs/artist/6c6e20d6-6ff6-4235-a913-2bf4a7fa2095.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
(Two Bonangs, Coated Spheres, Piano, Two Synthesizers, Natural Objects)
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 0x12cdd0c9f595e57e5b92b2f28fe99d482be339f8d827c5a681bdd58c2be59b9a. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QMHG41727002.
(Four Synthesizers, Two Bells on Tuned Wood)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c89e0cb19174b0d68d430775399df0e48bb41206b0f1ac207e974fc8de63cd. 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/QMHG41727009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe335c5203bebd3b646e3353b6369c68a001a2dc65205ccf47c88fdfe2ac94a06. 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/US6PQ2000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bc3bcc0571a48966f642f266047082a776912931476dd07127dcce56257b8e. 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/US6PQ2000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7341471506eaeff62f64c1ee5ca7aeff2ed2f9aaa6a8e54a9bcbf5c93ddc018. 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/US6PQ2000163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae3bc02c905f1d5931ef76b09f0d55b88353d11dc8da02e23d4eef8003af2fc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:32:36Z), 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/US6PQ2000164.
Notes on Colored Paper / Whistling Tanka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd5e5a6f98ddd0c7f5b62467fb93a2488f3d44b0758d7e1dc088bf480ca059a. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/USVML2304102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47230eacfe86f45d2d5cf044c117b48ca376ff4bef4169716ab67bd10fa29b0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T13:00:23Z), 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/USVML2304103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48815a846dd27fd76d90bf7abaa0d7df045364bc1dd7e04527b06f01cd4879ad. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USVML2304106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a816ddc8f1d7de7a65bb032fa834a51d73f081cec0016c3d366c66efb47009c. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/USVML2304107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6d9b990de7aee2882082ee37b68a2deb0c8222b16225b0c80156c47d749a9e. 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/US25X2102253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ff54327525af378b777a8420266952da115fe91d292abc51c695b84f0e7d89. 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/US25X2102254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10058a45d08304994792be061cc012d600883bad070d4c215bc356d9f5c9cca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US25X2102255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71069aba67b1e05d9fd0842796567b358b2e9351c233030306d481c7631dada1. 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/US25X2102256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab5d12bf7e6530b00b8dfbb3da6b3a49478938f34c991dfc9d7d43b4e1dee85. 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/US25X2102257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870f3ea69e39d62377bc19dac2ed438adc1a9f5562d6c1f12ff83e06920be2b7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US25X2102258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2355446c037703029283d889fd4df8dca92600c555082367d3b4518d30ec1c42. 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/US25X2102259.