thumb|Fehlfarben Members 2016. Back left to right: Kurt Dahlke, Thomas Schneider, Peter Hein, Frank Fenstermacher. Front: Saskia von Klitzing and Michael Kemner thumbnail thumb|Fehlfarben ZAKK Düsse
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 0xc8eb1a6f2482e60176441e4f85d0971c9c9acee3b79d84daf169a036f3af6224. 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/ece1bc3d-e081-4b5b-9671-18614b117a48.json and https://artists.proofprofile.net/proofs/artist/ece1bc3d-e081-4b5b-9671-18614b117a48.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 0x5f7620e5244163d58c324e64672294116006eeb9dd2a371d3602d978fa446917. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/DEA348002078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d6806dad2e755b49b1e4ef0b5b3d909d466ce777ad6df9b8a2c44ad0391046. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEA348002082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ab270ab742c000b9dc8a708db2c5a362291b0ddef578f56d1786d086c66ce6. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:29:50Z), 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/DEA348002083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd988cd96b4c05ecced5124c8b1c4416f62eecdef098877c3c22a03142ea06dc5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEA340300935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc00600ebdf3e9dd42f0bc1e0ae4de35c1285052680a292763f20abc10badb1. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA340300940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873df911a32740a16886b5892c6b524d2e266f652f77c3dcc7e0e18a1535e562. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA340300941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff1e5e8e1b2ce011de73b8bb4c550b53ef0f38bf7e78667a04d60c9364ec328. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA340300950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55338d29b7d28c18685cf0277033ac725a2398a8a521d5c2b922451a073770d4. 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/DEA340300952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d68f973057dbf1e200eccc4279e3906466eb87d4244d7617a8f6caca9435702. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEA340300955.
Die Platte Des Himmlischen Friedens (Remastered Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f6761945ffa46cb7a5a0d34b2c5f6c02131fa249daf17114894408249ab582. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEU162205966.
Ein Jahr (Es geht voran) - Remastered 2000
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b7833eb5abfaef1850317d7f3e2da6def9a871282fabc10bb4157822593be9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEA340001088.
Leonard Cohen in deutscher Sprache - Poem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313d59f835fd4b2d036442fe07a9f6f8e55f7680d64e969bbc5fb16570f52427. 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/DEE861400374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce122155fe0438abb561f131193c2b79f93222fa8f0259e421e5c4ff2ffa04b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEA348002084.
Wir müssen hier raus: Eine Hommage an Ton Steine Scherben & Rio Reiser
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444cb4fbe399bfdb62976a93677fc6cb42653490df7ef48dab6ffb2e2d1f6030. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEW271333739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3532638794284d69d82c9cf058fce49b9ee8cdcdaa9db620e2d5ac91f7bc06. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEU161602339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0956f2afbe1ed7dbdfe148ca4ec899d970932c6d5318ba1054a92ac2b426d7. 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/DEA349000536.
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