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 0x121e799a86cf1703f8a1707e6800f92282626fd6cfdb2b46c02a8887e094c5f3. 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/9a1e481a-3195-4e15-b1d2-e4d8296d324c.json and https://artists.proofprofile.net/proofs/artist/9a1e481a-3195-4e15-b1d2-e4d8296d324c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Kaltes Land [Ein Fall für Sabine Yao (Ungekürzt)]
Abgetrennt [Die Paul Herzfeld-Reihe, Band 3 (Ungekürzt)]
Kapitel 1 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
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 0x1739aaf8247103e1817a3dad5999ac84c00cd61159d27b02eb8f3cdb9dba2c26. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181053 — a six-check JSON result.
Kapitel 2 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a8d552403f666bb7b2559317f609da45b4de7bcd8583582a5fd5fb85a938fc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181054 — a six-check JSON result.
Kapitel 3 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59ecc221fedf4ead6ca3ba88d60d359c121f247cf4ad0ebd4d4a08dc0204ec8. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181055 — a six-check JSON result.
Kapitel 4 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a979202dca3553d80b153bbca2d65c5b64e10403019e7f938dfd3d878deacf. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181056 — a six-check JSON result.
Kapitel 39 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba88043dd57535926ba5ef5dec6645ce4dd83e753c61a8e1ffd30f5a6def463. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181091 — a six-check JSON result.
Kapitel 5 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa463d80d763cb6b6f359b8159d37b8f0093dbc972cc6aea39aaa5d11e189618e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181057 — a six-check JSON result.
Kapitel 6 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2541d368e742243f4f2c40daec61b40c505022bf88559f7f64341703f904ed. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181058 — a six-check JSON result.
Kapitel 7 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5add2f7aff3e118680ac514353fbff3e240da7b2dda6519d0586ea0003e7443. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181059 — a six-check JSON result.
Kapitel 8 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b725e5d2d2719c5936ea62d8ca19a52c243700480ed02ec1674e64b73dcdf6d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181060 — a six-check JSON result.
Kapitel 9 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e0df817da0edd7c6e49734a0f14bb1d67706d0df5884da2fcd16cf77ee8a56. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181061 — a six-check JSON result.
Kapitel 10 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf2f97a137076ec422b2596ff5197d52d0572b0758a6fc5147a261b0c8de12f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181062 — a six-check JSON result.
Kapitel 11 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472d458b4b0e41cc672e78f870f562834951473f16ef5355a1106d8b32ec13c5. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181063 — a six-check JSON result.
Kapitel 12 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19da0d3ad7ef82028481548382210ed35e0f3ec336f7a04599d3ba971510833. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181064 — a six-check JSON result.
Kapitel 17 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5518fbb95907e06e016c199efeed958a91f6c990b00e8e62fd3cb328e3f0b0d. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181069 — a six-check JSON result.
Kapitel 64 - Abgetrennt - Die Paul Herzfeld-Reihe, Band 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2799b4307f537d5e15d8ed99d031fb1d3882f66845bb90859ef5d0cf084558a2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1A32181116 — a six-check JSON result.