Volker Bertelmann (born 11 October 1966) is a German composer, pianist and former rapper who mainly performs and records under the name Hauschka. He is best known for his compositions for prepared pia
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 0xafda61b2b5c155c9e27b94d631d228e49dba152c03df9d2d9db872b4ca4e5956. 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/5e1a4e72-534d-442b-8a44-6ee05423fd7b.json and https://artists.proofprofile.net/proofs/artist/5e1a4e72-534d-442b-8a44-6ee05423fd7b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ammonite (Original Motion Picture Soundtrack)
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 0xcbd7697be5cc9382ff774be91c123539d4d01274f1a470dc4cf584dba191c397. 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/USQX92004510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a8b41c71acd5b58a7e30dcfe4413fb34bcf04e6452ad7f2a086bcb6d7fdb0c. 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/USQX92004511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa6ac242412790a006c61aab67fb59472b8cabc86df37919b00822bcdf54cb9. 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/USQX92004512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05ee477be7cafae55f9a90fcc3bb2caf64f9042548a2402ae9b903db91b27fb. 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/USQX92004513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb665607af54cb6f35583f716645de68cd7ff5cb74e7b7004f4f93ad9f6a77c. 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/USQX92004514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d66c9d5bd7757ec2c3051574ae09b8f96dc18420b7580279181a157b227423. 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/USQX92004515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647a3ec64b348a483f7de8f7002b3b2ae29bbb59bc83af2a6825ae6ee847566b. 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/USQX92004516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5e3ace14b1a1cfae03dfc0e8debe91ba9cbbf38d652b372573976b2cd94077. 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/USQX92004517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1777d5694fc0b56d5b1bea4d2eac88b03dc73fdc1aa3f452e1509ec0b692c566. 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/USQX92004518.
The Old Guard (Music from the Netflix and Skydance Film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54b0ac08b6be83a5dbf798e2b393acb7f42a26c9e78f6b51be89cba1b0c60bf. 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/QZ8BZ2000281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e8b03a1379c21b226a99b716188a4ddbbd04d06c34e4839a4ce9879add58da. 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/QZ8BZ2000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce27e8d7dcb2ec507d35856e61840d2c98659896773977f2f17d865f637643d6. 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/QZ8BZ2000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd464eca6c83e116a072ae6dbcfdd2ef4160e578cfdf3804b42e283e10659e6dc. 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/QZ8BZ2000284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2d51421c9a5931b2ee090d63700dc99cdff903b096fff9f28d939b7100563a. 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/QZ8BZ2000285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca8eb17cd63315df34653fafd98286c8824998830f92d41bf7bf8776cd6ae73. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ8BZ2000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4e9b17a2ec572961d2c0bd4067602e21e1941eead9b0408ca5126bb37b65dd. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZ8BZ2000287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddfd258f54444f09d858bbc89cb883c4c1e16ba40dd576c4ceeeb914193627e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZ8BZ2000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777dc8461999ac0a9c6613259b13771a6808eae848ff504cb20481e94828871e. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZ8BZ2000289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7700a15a10ea96530cd67f9429cf669899722670d4c34d43a10cb53980faeae. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ8BZ2000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f1271a636a5d9f1e75d0626bd78cdbf3785263e1719b6a8aa060735538f2b4. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZ8BZ2000291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6863ff01658fd2c33eb5e4fc341a328a96ab201d0d72b913602624bbdad189e. 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/QZ8BZ2000292.