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 0x23afa3a53bd6e454fc456e7a1c97a50ed9566182633b26a1ea52a6511d121f7b. 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/ce78e548-203d-40ba-af4c-1592cf4953fa.json and https://artists.proofprofile.net/proofs/artist/ce78e548-203d-40ba-af4c-1592cf4953fa.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Kapitel 1 & Kapitel 2 & Kapitel 3.1 - Unersättlich
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 0x99ffb15115499a83940703e3364873f51e8dda261ab5758a87acaff147c8a29f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM30828105 — a six-check JSON result.
Kapitel 3.2 & Kapitel 4.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81de77f8f1dac5a83b22593a67267693fd068c244bdfc565ba58b8ae4d5d1436. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM30828106 — a six-check JSON result.
Kapitel 4.2 & Kapitel 5.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553b70e8e85e0a0025e26e25dc5bd964b19c8301c6c58d867d05ccaca6630a5b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM30828107 — a six-check JSON result.
Kapitel 5.2 & Kapitel 6 & Kapitel 7 & Kapitel 8.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c461faa17e513a7a215db084470f5bfeb3ea7850e8456b6ef03dfca1461498. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEWM30828108 — a six-check JSON result.
Kapitel 8.2 & Kapitel 9.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c36d6e51a47a131084c877c7df7cac4ed356a684bcce3e4b65ffe219a582d9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM30828109 — a six-check JSON result.
Kapitel 9.2 & Kapitel 10.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16889f67fe8dccaa18a5850c7e46dc141caea1c63b6a0590261a40456288112b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM30828110 — a six-check JSON result.
Kapitel 10.2 & Kapitel 11 & Kapitel 12.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8d71de21f86b9a8a0aa0aa6d855faa6c5ff527329e3d1b5cb16c130d4cf58a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM30828111 — a six-check JSON result.
Kapitel 12.2 & Kapitel 13.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279e3c25e706e97414717c90409b017b2b1092cfd7cea5610d624ee962334db2. 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/DEWM30828112 — a six-check JSON result.
Kapitel 13.2 & Kapitel 14 & Kapitel 15.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab79eda7baea4da6c42de3806811088184b5be7b25cbf222b6b27f5fc311f90. 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/DEWM30828113 — a six-check JSON result.
Kapitel 15.2 & Kapitel 16 & Kapitel 17.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd12ba7a6e73f106e3559fbffb442ac603a37b9aa66094834cd0fcfa67ff5f9f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM30828114 — a six-check JSON result.
Kapitel 17.2 & Kapitel 18 & Kapitel 19.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f7efe02f8b8f59264b10e44b80e41fe9a6c4f451a7fbf3a536d6270af92027. 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/DEWM30828115 — a six-check JSON result.
Kapitel 19.2 & Kapitel 20 & Kapitel 21.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41616b33500505b18522e53a45ff7f788eb1514a4a248503919c2d980456d68. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM30828116 — a six-check JSON result.
Kapitel 21.2 & Kapitel 22.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1e89130caca9494cb94262d2c51b7e7a17ad598f2ad1edcf32fb0fb85ff045. 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/DEWM30828117 — a six-check JSON result.
Kapitel 22.2 & Kapitel 23 & Kapitel 24.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cf1c8cd2dd7b0acb71393470667a27b1107fab5b47a0d1baac1f4227eed4c4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM30828118 — a six-check JSON result.
Kapitel 24.2 & Kapitel 25.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9338e8b5aa30b4cc02a5075c309be6c31be1704e77a383d306a47b96b824f21. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DEWM30828119 — a six-check JSON result.
Kapitel 25.2 & Kapitel 26 & Kapitel 27.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6a2add8cce5de5a2c0fd0f47e322775f35eb500c2ddf06338f6af0304b5733. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/DEWM30828120 — a six-check JSON result.
Kapitel 27.2 & Kapitel 28 & Kapitel 29.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf596a5a20d9ba1cf59d7a47511ec983bf5a380ea71e5d9a9cf6637f75c5d4a76. 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/DEWM30828121 — a six-check JSON result.
Kapitel 29.2 & Kapitel 30.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3808904451bf36341ab98dee26caf5cbfa667cf768a039fac7cce0354cd8cef0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM30828122 — a six-check JSON result.
Kapitel 36.2 & Kapitel 37 & Kapitel 38.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b4d24e37b7076f3c51a3c3f47402013533765ce73b4229368c5d26efa8b9ac. 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/DEWM30828127 — a six-check JSON result.
Kapitel 38.2 & Kapitel 39 & Kapitel 40.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf99714ccce6e8fb753e63ed0bb6d31dd3683e3c1d1cb75734267e6dfc2af74. 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/DEWM30828128 — a six-check JSON result.
Kapitel 43.2 & Kapitel 44 & Kapitel 45.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d073eff557925bd41c9372cadae9eb21b49c5b10d82571372db64ac7f7fe069. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DEWM30828131 — a six-check JSON result.
Kapitel 46.2 & Kapitel 47 & Kapitel 48.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc763b5bcdea6ae49f164d62af95f642a20cc9e228da4fa10c44b9ca014a136d5. 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/DEWM30828133 — a six-check JSON result.
Kapitel 53.2 & Kapitel 54 & Kapitel 55.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e031bc9a76439b4ebc1f26935646579d1379c7077996698349d25788d758be. 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/DEWM30828137 — a six-check JSON result.
Kapitel 60.2 & Kapitel 61 & Kapitel 62.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c3c7900baf195b4374cbacbd11b417f631f1e36993eb0379937495bf2a1b98. 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/DEWM30828141 — a six-check JSON result.
Kapitel 63.2 & Kapitel 64 & Kapitel 65.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e88709b90fb8c93f09163b7987f2bd1be824ffdf7ad3b6e45f9dd4d75e78ac. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEWM30828143 — a six-check JSON result.
Kapitel 69.2 & Kapitel 70 & Kapitel 71.1 - Unersättlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46028c42efdd555b52f1521c2e4c0b0f37893ea865e12fddea6a92099e22e16. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEWM30828147 — a six-check JSON result.