Jo Blankenburg is a German composer based in Los Angeles. He writes music for film and motion picture advertising. His primary musical instrument is the piano. Early life and education Blankenburg wa
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 0xf61bd12ffc666bfcdaea2302b10490da2fdb6834d7df5d99a2c9df9ba026ba87. 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/28697ae4-eb9c-4f6e-8ab5-5430d6e02094.json and https://artists.proofprofile.net/proofs/artist/28697ae4-eb9c-4f6e-8ab5-5430d6e02094.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 0x659d4ecbe7a6d3758c6daeccb22a7d5619e74eaf9556bc7a56e12b37632ecb23. 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/US43C1616661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb331d7919fb00db26dcb3dc536da34ed9fcc050fc9a7733c163a1def7ef876e3. 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/US43C1613690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26841a042b5baecbcd55ece1491c0cb26bc4c06814b42f09ef514e8346083a3f. 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/US43C1613258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a553ed954f4d5bb8b4f7c3bb34071264db6c599de78e8c13d542d3f2973130e. 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/US43C1613250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4189351b0472524909ac6acfcbf2370cb5b8946e4a3c171f3d51298bb71876. 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/US43C1613246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c032dd23e037fa3bbebd7b6ff2e6e7c0c7cfcadb5e61dae4e89fc5b6062f45. 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/US43C1613222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05627fc67d2f48e61b6cec6bbca961c0ca38348005cd358af89953e378cc703. 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/US43C1613230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacb7e8e686e738df24bfcdd265008385a0305abf94f4999b082f9272d336202. 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/USA2P1877026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff321f1df2cb14bd2402246f537d906ca7c6d8d0b82f767d24529b8941b2442f. 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/US43C1608860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81ca2321c377dcabc7145b23eab873777f9f9e5c523caeabc0b7ba260c01544. 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/US43C1608872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145b6e4f72737d96dbd4ee30a0192dee1f54780a5dd49deb7ccbe0b19b742d71. 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/USQY51774044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1787b149ca6b0f639d75da7ab23f767e52b23896bc09bf769e2d5036f5c59bfc. 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/USQY51774045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956157571cb601cec399121b0e308a6f6592e97be89ba57ee61191827fb57592. 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/USQY51774046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607c32772adf0e1488c17a20879cadc6336642738107ad3d8c6b93cd66edb9fb. 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/USQY51774047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1db53f086838ffe99e7954b7744d7c26b5ec2eee3c3c7c59ecc51292019b83f. 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/USQY51774048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed43c3874c0e59c8483d9069b9ce0c6de5d4528c6bbc280bcd4deebeb9325be. 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/USQY51774049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf930d12a89505a313e395e4667800dc80d5d3922e3acf77035a4040170e0c4d3. 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/USQY51774051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8630f2b563ebe81d7a5d6fb7b9477210e9ac31ec46bd3295700cd42f3e7347f6. 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/USQY51774052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf8ecb02eb5180d20d717cf0beaf646fb72f625d06a7329926d5f968ed18a23. 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/USQY51774053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a7c22a9a194cb50ef0d8307433468feecf37ccf04068cc89216856a78b25ee. 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/USQY51774054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5745ebf4b21614d9259f7c0b6ba8a8079cefa6904550d761c7ac72f742c64eb. 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/USQY51774055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f8df7e30ddbbd88f4dd1576e24be2824515980d1c8404af59e9b6352a7aced. 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/US43C1603042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca29efaaa4e149e69807cd0d69e9ab8526a36ce0016c31d4395aba22428c81f. 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/US43C1500925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98402d8f41a249e80c767d439c130aab7fdea351dcc4f6ac91d0ddc951ee1f3c. 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/US43C1500920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb36d068567d51e32463f7d0a063931ae0c3e4802ea7311e0b678c11246afbaa. 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/US43C1500927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e418b1a3e80ab22687cdae4f5a21f6490cceef0b9b4f18c270bb287e2ec2a6f. 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/USA2P1215954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9add1aba66e2c7e89367d790e76cf5193b42faef9c4cfc99971426cc186947b. 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/USA2P1215955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c5bcd29f5e848cd6489b10273636f328ef2178cad8c2b732267043367549d8. 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/USA2P1215956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd363411cfa81f66564aabcfd319647c83afedd69976c5b807cd4df32d0c62efc. 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/USA2P1215957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bd144fce83a3104900dfeec1dd5f0ad4b31417bae2422c0515f76b27ead296. 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/USA2P1215958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc02b4f3949210b1f4bae7e3d95a7c46cf42a34a052ee2a91e3c1dd4183ba1d. 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/USA2P1215959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff75fe04b4557621076bd38729f0df3f83379d0ffc94e06a22437bd328220417. 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/USA2P1215960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8df1923d9203cb467a9a8128cc1fe469f1f0d4b9acaf94aadbca1d7aacc0421. 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/USA2P1215962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ddfb92326d85902453ca80139280341aa6ebe40b15a042f2e576c3d7aeec39. 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/USA2P1215963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176ad9816b1311ca633c86309cc4371d92c91fe969e06635ea0cd1831ed1bc6c. 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/USA2P1215964.
Vendetta - Position Music Orchestral Series, Vol. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e94e966bce814b1396cba25878651c59f026cf0a4c2c04a3b84b337811284fc. 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/TCAAW1179592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba458af2af9156f14b83f06e92dc6e559d01754bf6bd3eaa37fd6f3e7cc5114d. 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/TCAAW1179599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d257b194bb37c23efc389c4fc1ee357ec116fa8e1248fefd3471f6a374f7a0a. 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/TCAAW1179610.
Vendetta (Non-Choir) - Position Music Orchestral Series, Vol. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2963343fe6c2bb0ff00c269f8e315d346da071e964792cfc65f2a5392123843. 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/TCAAW1179743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa3b7fd5f2a0941b2342bb371ccad08508587201409837ced9add6f80673116. 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/TCAAW1179750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02068cee59e78e883ddccbb6c8f59d2f5efb6f3a5c7e73d4e613ec1a7a65e151. 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/USCGH0831620.