Friedrich Wilhelm Nietzsche (15 October 1844 – 25 August 1900) was a German philosopher and writer who started his career as a classical philologist and turned to philosophy early in his academic care
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 0x8f50c0f0cc730a0f7705856509d5aa3c28433e9fc3b04c4347f8874d0dfcb986. 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/360b4ee9-3ab9-40cf-93d2-0ac8c71c847e.json and https://artists.proofprofile.net/proofs/artist/360b4ee9-3ab9-40cf-93d2-0ac8c71c847e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nietzsche: Lieder, Piano Works & Melodramas
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 0x8cba1e32f17f6a992d465bac1c3393916fc8ac4a0fe997958b4779c1407b910c. 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/NLA508901308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fea05aad061fe1f453d8687bde9c258774ec514322d759388d1a7ad585f02ec. 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/NLA508901318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7cd443f6c7db3b61f700783dbb9e9a6cc74e911e8b80da9ae200d82931857c. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/CAJ729814901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109b44b2753b0be5598d7e754889d759572ed3b50fc8ed135db628619ec1e8bc. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/CAJ729814801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfe23c8122573baba74219f9bb9f50211095aa3f9ab893ee0c323e26224748e. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/CAJ729814804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdd203c546cdf138d35c779ad679803ce877a44290d3388b82c01f891b40378. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/CAJ729814805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e712d42ef1b8f625218a5d9c32907ff76d185a7fde6243d8db76f5a97e58544. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CAJ729814807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf772aa94c3bf238e4df8e235f192100819f2b9f75b0169b1e0decbfb9f77b9bf. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/CAJ729814915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf030e2836dd7d82dad66b0303b4bb8a4e42db1b81a5a953d166761af03145058. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CAJ729814817.
Nietzsche: Sämliche Werke für Klavier Solo
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8624ed16357580df9be5c5074478d21dbb412ea6c7da0eab8d525a4a1670f292. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/ES7931700154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa437b25363729ba75138a18fdfe78e3c88c501c4cc333e7f13bae49f50b7864f. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/ES7931700155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7346489d61b146d38839601ef6feb912fd0e13bc0487bf1ace626e2ce8819a37. 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/ES7931700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd2dd9360df65ff2c7aa77d1bd43360c8e7f715a1de4e265bd759a3ad71f8e2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES7931700157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f8c02d4b77ab13c22731a784da4764422ae5b9266165d7722a26c42427cc41. 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/ES7931700158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95a9817355de7438f3ea48c72860eac0f86c9a859cb892447deb5f0e6608b9e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ES7931700159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141028351319e7ce5ff995bf46181f820951271dd6a00dbebf1e4e9518c04343. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES7931700160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868c919e237687550ad38b2906ec68f9cd28a60c2cfa2f8d3ca75f75284825fe. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ES7931700161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e30b98351b2727585c265ccc1eebce3f98b221d42e47da2d3ac4518be41b2fd. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ES7931700162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6575982a6e84ef184806e2b400c85b4b4d116146beb1022ac74c94bdc98cd5cd. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ES7931700163.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f5982163f6dfb032a1fafe3daec8717b08a213bacfc064815992655cd26c54. 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/QMDA62178574.