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 0x2bb75e7051ca3562f91fe4a31238cfcd6e0739e6c9aed20c737f587b4b057245. 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/88a2e08c-a9d2-411e-a5ee-8505a3c22d16.json and https://artists.proofprofile.net/proofs/artist/88a2e08c-a9d2-411e-a5ee-8505a3c22d16.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 0xaf9f8f99f4901e8fca96ae3210dc551166b1bebb118d3653e34e95f412d46015. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLQ062400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307b351bf9f4a38b1a22598a43383db68145f17ea1ec8df65d479d869fe2f59c. 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/QZHN62446370.
Kindertaxi - Karaoke Version zum Mitsingen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d62fa356037cf311f971dd7dbe520ed10ad46eb1149d7c7ef0ed9b69c92384b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZHN62446371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0730b1d0d81f5cf52faefbd3878c6193f23a9abc0c755ce7e3c63433d92c3dd2. 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/QZHN62446372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012b37427e24539e281ad8b6a3dbaaf4d4d3f773841a1998f6cd71c53a07ae31. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEYX82174157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb775bd191cdc6842d281c798783ccd337a932c50c43a9340beb6ee82a56c490e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB32301231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1939eccce8af60345980841cff1bca6cae3e8966703fec48e0cee47f73ed9f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEYX82168001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b94c39080f8174253df676b525a6af821176f80273330ac691945c7184cfc26. 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/QZMEN2302608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a2a2f5945851178c12f93b916cfec9f9b06bd0a1ff839907398eac20c0010a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEN2302609.
Gute Nacht im Träumeland (Das Schlaflied)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dfeecf3a40e5ea4e0dbc2dda41d4cbf9e7bf48e3ad93c52337b504a108727d. 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/QZK6Q2318482.
Das Konfetti Lied (Instrumental - Sing mit!)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123e4e55d827ca7ff0e865f28a779f4c9386ce0b016d070b65fae3c5e38b7094. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEEE42300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c6344552acea432e1479ea19bcfac5f1deae6032cde9324dff3b022f4c0c60. 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/TCAGQ2281359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb65993d699b3b96777d28647db9053dabaa8c0acfda5593e8fadc5a876e58c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEYX82137993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac267d42000237daef50e5de949eb51092ba2e0ed83a13e0a7c8962e74c68c4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEYX82127431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920f6dd0f4840117523e71c9c6b6eac155f191836cbd64e17d8631778953db3a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEXK12200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fc89eb7c6ecf7d721b359c251a6405e52538e856c8149c888cbaeabc044a10. 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/DEXK12200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24af679b83d9e9649e922b2590695a09c34f990a50f98d8dd040b2cbc137f105. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEXK12100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0145dbdfdf11c79346f27dfb0eb32bb0fb18833ebd722a7b3bb6e840d166cd68. 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/DEXK12100033.
Das Schildkroetenlied (Karaoke Version zum Mitsingen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d78f8443e385ac36301d439b51443dd87e89abffd7528a80805742de3855d71. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEXK12100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6669370f650ba59a393e2cc86eb30fa694560694928c8d70ed327cab05d65ef2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMEM2091915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a1cf38e638dd3c84957ac5ae129d786bc72399aba21068bff8e7682d43b21c. 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/TCAEW2004474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8039e65d74862c5560825043ab9c70fdedb6f6792d6065f99ed96a1958df5485. 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/DEEE42300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eb0b0df38b9e09f39428af266b833c7e62ac374560b268236179eb63e2b4b5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEEE42200025.
Es tanzt ein Bi-Ba-Butzemann, die Bi-Ba-Butzefrau & das Bi-Ba-Butzekind - Die Bi-Ba-Butzefamilie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6fab3019c480c3abb936dac12b1bfb53fdaf8b23112f883a59dda274ecb7f1. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEEE42200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ddd724cb0947ea1712a3ae6ad814d44aa14f443f957cd9c5895cb331390d05. 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/DEQ890901209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123e4e55d827ca7ff0e865f28a779f4c9386ce0b016d070b65fae3c5e38b7094. 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/DEEE42300023.
Der Oster-Rock 'n' Roll (Der Osterhasen Hit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0756ac552d353bd5b17c2264822ef6e549ac35dd8c9b48fd3ad8d863d6ad32. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DEEE41400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb7e3274c1c5cb686ff30fe13f288e6140ccb24d215b0cf88f8edb221c6bf16. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEEE42300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe1bb25500759bcd210b809a514d12914f918e2c8f994e6b52aaa2309d0e4ef. 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/DEEE41700097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56e1685f9aca1e7ac49496ccc98179d9ec3eb1457960faca87055756262f3bb. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEEE42100076.
GUTE LAUNE KINDER HITS - Zum Mitmachen, Singen und Tanzen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f9e819b576cd17d88e86fe38501f256796abeee4a07419c709087cfbca2178. 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/QZTAU2151679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a0287901c5c7d442be68306ec3df377a5b90795cbdc1affb678637378c8368. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/DEH792217101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360840b50f1b5570e88fff5781defa7a86be6f1ff3a7c5372f638bc9dc1cd153. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEYX82124576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3494677613d49679b3eae6cbf54e244197530fb24df663df016e63bfd5301a87. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DETX32203006.