Bruderschaft is an electronic music collective led by New York City-based DJ Rexx Arkana. Conceived as a charity project focused on cancer research and treatment in the wake of Arkana's father's death
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 0x849255d96133682ce261651dfe113b20347cc0267f36accb368678a133bf9e1d. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a40c6139-029d-40ec-8206-1337c9d3fbdf.json and https://artists.proofprofile.net/proofs/artist/a40c6139-029d-40ec-8206-1337c9d3fbdf.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 0x4c79e026fa5d72fa3c07f1f4a9db84fd1983bb277da029fa6374e812a3a52318. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/BEC260302302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae679a094ebfde2ed7247f93b8316a8b7c18d7e473b4be3ab404d542e2462255. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BEC261380301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b952808596ff2d556c2888795efbb90b1abc6777ae1e42cc138b98bf4f4ef3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BEC261380302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a03baf2685f53e789ec1ed35986d5bc2c6516490a4b6a77724b2c3fa418a94. 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/BEC261380303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9657d196110bf939c8d88280a7e3c54fbc071621b1c3a2dcc65f62e1ea8a03. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BEC261380304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9af7ced6eea444bbd1644d6017f5761350f3e3fdcc8ec5d0d9636a0cd8d885. 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/BEC261380305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa293c91d3905d2411d321a1c26f2c5efa3cf1deb10ba62b33ad5456eaf2046d6. 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/BEC261380306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd90bb20120306fce14caf0b84839ea461d003fd2c51415869f5cad261b377e1. 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/BEC261380307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927288c4222ec01a7758bdcf7b2d97f09b5ce6909f34ca695f81c290c0f0861d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BEC261380308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285a7ce07e959f6b9f85eb86a59a577b156fce96ff77dfea48490fd1ed86b631. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BEC261380309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23515fdea9417956429603c271b720252477fa6497d06186357e1f9bcd99aa0. 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/BEC261380310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf06539172079fa39090fed7bdd80ab3024122df55e6d2790135b92f0817f37. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/BEC261380311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fdad73f4a1ce99f5491db0225a11053cef725b9baf85e94bbe27e4952dc730. 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/BEC261380313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd5ec3b835f7c8b37584a710b0f67c5ac05ecef64947e8a4f0cdfa20c4efe05. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BEC261380319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed5fabdce0696c240a90ef7cf75cfb699723a1ba714a976e62202eb1a17a217. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BEC261380320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78ca1c46887c05e09b50e59ff9b94b7cc38b3b70ebb0937f5557162c39277c1. 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/BEC261380321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefdd44ad9a960c967360d8d5e5895f927f9f2a2ecbbd58d7b15ba8252eea3e8. 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/BEC261310301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65d9d00b87c443b4356a8ebd0a9d4c1315c5f2fa002fe4218f74004d5f904de. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BEC261310302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c909a2bad562a06c091784c7f8b2a22a3355932e56957ba34f959090d1dc3b. 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/BEC261310303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a823e91c98d593c0f3f79b07143c865e11267346e45309886ba2268f0975f2d. 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/BEC261310304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6952509cdcb8dfd51b4e45cb4918f6e4a0375b7ada076e4c8900a638789850. 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/BEC261310305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19478b292adc0ad07ec48562f68e571ee4c89e21e7c518a395bf0094df1bf8fb. 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/BEC261310306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900ace0a131061b233498bf156548ab43b10ef43dd5209803154e37820cdca1b. 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/BEC261310307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a06db08902ccc0b5d03d0af46baa6dabf721537ae23c9782c07af691972676. 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/BEC261310308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bbe524a5e064a546047731d6b69e12850aef935750355a388563343ef8e848. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BEC261310309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291d2615354e1c2bc7c2afef1b43ff0c7de8e7b5a22019dd3965289b2e6f0795. 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/BEC260812503.