thumb|Awarding of honorary prices of the Zelt Musik Festival Freiburg, Germany 2015 by Gernot Erler (MdB) thumb|Zelt Musik Festival. Gerhard Polt reads Peter and the Wolf accompanied by the Russische
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 0x5c4b03b8e40e143bcd116aefe838db642493be05d231592c2b235f82856137b2. 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/7507f825-d6a9-4b0f-b102-7b1488201127.json and https://artists.proofprofile.net/proofs/artist/7507f825-d6a9-4b0f-b102-7b1488201127.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 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 0xf2690116bf4d741c7ee84d95a2e7ea5f6ff7a9c65f38a8e553e8299047e70539. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEC717700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d9dffb729dd9f3d13d69cd444ffc5b006485b671a6cb2efbd4d3ee4b377b86. 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/DEC717700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa810f3478615a5e2110e533565641278408846ccfbf4e76205e18dbfced529a4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEC717700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d82b88364d8c9627820e8a9e43783a7c1941a6734575c2f892d2e5f4e2b5e46. 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/DEC717900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc918b1a01c8a297202e880f134f5c38b3081c41a8e09d824df70a9297558a494. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEC717700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc2033b760e5b3eb8277b8bac3b34a5402bc6ed79bc73dcac1a1e8c316b66a2. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/DEC717900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb978fca918caca11f55796e8f84b0f808cc4304cbeb0555d4c6eb37f86a5661a. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/DEC718100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89824b88908e7f7128ccdef83db07cc7a00f1474b50c55c53f29d7ff5cf34231. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEC717900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f58c4f845922c959894289e84ae942d1dc6cf0cf8f834c278cdca20ba692041. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/DEC717900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2bb4780e62f2723a0c3d9c1920052371634c73fe33d8926c262a3d9ad384df. 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/DEC717900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9696d732416da0f546139605f143cfbbb2208482e5d59fe2201d8f3da80636e0. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/DEC717900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb97360d7b5535af56390398a382145adea7a0d84731993495fd9715e3f9781a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC717900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e1c441015a010fb1b4d88a252e1435947e467d896b38588861d7bc77e71e79. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEC717700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa810f3478615a5e2110e533565641278408846ccfbf4e76205e18dbfced529a4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC717700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79d0befc3b6dc5b05f38a65e464f7883990ff1190b370276629c68f804f3dbc. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEC719700554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89824b88908e7f7128ccdef83db07cc7a00f1474b50c55c53f29d7ff5cf34231. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/DEC717900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb5b00bc933bb61e69bfb420addb53bd5c0f1e88174396a1ea27d9b0883a346. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEC718100007.
Attacke auf Geistesmensch (Live-Aufnahme)
Der Weber Max.3 - Attacke auf Geistesmensch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e97d2615ea471a9bebb553ca58bb243ad055d79401a0c69e58a94aab92ed7f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ79882304.
Der Nobelpreisträger.2 - Attacke auf Geistesmensch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed90aa6accd54b8865b1e0ee33d7943bd2c31b67510271323f59af5656d17edc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ79882311.
Der Nobelpreisträger.3 - Attacke auf Geistesmensch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11601fb71d174095d39ea14e989ecf8d45d533ea6c666392f474f5ad0458a8bc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/DEXQ79882312.
Hundskrüppel (Lehrjahre eines Übeltäters. Live-Lesung)
Eine menschliche Sau.3 - Eine menschliche Sau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf871512b49308f3851c9b349eac5256f90821f877826c0176751d5470caa9ed. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/DEXQ79823641.
Der Standort Deutschland.2 - Der Standort Deutschland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ba767b01021bb8160a87f8b889031b9157a7c8fe464d95517bacb5af0a810c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ79882103.
Der Standort Deutschland.3 - Der Standort Deutschland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a1d4d391d191761aad5780b64bab0cba60a4a648476b210d2da7c55ce25f16. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DEXQ79882104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17a9d580ac6ddf3d675f7b9a7c58e459586829fec891f8b6c4a0998116574cc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEH191300105.
Als wenn man ein Dachs wär' in seinem Bau