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 0xe2e72ba477754eafedf1267239387676f48121926e36929f54d2c8811da5697e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b245c56d-a63b-44f0-91bd-458c5bf0b601.json and https://artists.proofprofile.net/proofs/artist/b245c56d-a63b-44f0-91bd-458c5bf0b601.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Meine vier Jahreszeiten: Der Frühling Sommer Herbst Winter kommt
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 0x331a740bd7c9fa1b9325eb2df72084c3abb216e3930bf6a907cbe4f3347d17ea. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEEE42000036.
Endlich Laternenzeit - Sankt Martin Kinderlieder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24591f0205b3d4d031a213e87a66f54424ac275dd4518d6c6536f314ef80a420. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEEE42000188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8d2630b638194261158cf72c13e6330af62740b65fb0eebeccd883757df3c0. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:58:42Z), 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/DEEE41900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e42fb3be9c60a9dfe4f98652f67ca7237dc3d8e84c827d1998196b3292862c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEEE42100027.
Und jetzt geht's los! (Wir singen und bewegen uns)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8504ed8cee7057f2f16d3323f2d215117615dd55f1841dc25fc8a395cc53459. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEEE42100264.
Mein liebes, rotes Auto, Rutschauto, Bobby Car
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2281b9ab86b6e3133326cb40ca13db4419ce5bb750f64c479fe0aa50e86c9819. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEEE42100388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e419fdfd6b82020d26a49c7fce1f12407fda7aad6fa42018f9befa658b625bf. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DEEE42200002.
Von Frühlingsbären, Blütenzauber, Bienen & Osterhasen (24 bunte Vorlesegeschichten im Frühling)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5143411794de8a0bd5bbb52fcf6de2e0c05080d7b7ee09c984175cc6dde97040. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEEE42200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f546ff3e63289f5e4fb8cdfdf4b7d89bda27646760e1619309449b54ef25b8f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEEE42200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ddd724cb0947ea1712a3ae6ad814d44aa14f443f957cd9c5895cb331390d05. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEQ890901209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf686f32c9814ea29e14a1f4a776191a21ab1f6a41c4595c57c16d2507133302. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:30:54Z), 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/DEEE42100331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a84f0ca6bb1a4a076e8aaf5f25b2d5b210237ebd436b44e9e8b0c98fbc7b98. 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/DEEE42200029.
Unser Volksliederalbum - 30 bekannte und weniger bekannte Volkslieder
Endlich gibt es Sonnenschein - Sommerlieder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccc20b0938cef2eeff304c3f02be5c64f12f6ab08aa90fb561cee032571257d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEEE42200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401cf6763775356751102bbf1f5d92cb75c28e7cc885d0d0481a1a0612b4bfff. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEEE42200184.
Zwei kleine Fische - Das fröhliche Kinderlied für Babys & Kleinkinder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd435828d8264ec081c9a3991743dab80e39ac58fd4af8a1a6938ee0e9401437. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEEE42300001.
Kleine Mi Ma Maus (Das fröhliche Mauslied)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a5c6600be5465e7bb8eb3a2e9f2ebca517808dc6ef45ab2fdd114b0ba71215. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEEE42300289.
Musikalisch durch den Morgenkreis: Frühling & Sommer - Das Album für die Krippe & Kita
Erntelied - Obst und Gemüse (Pick a bale of cotton)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f48a33587d762b6bdbfbaad08d6ad27f57d12068c97fe6838ed2df5edbd5a06. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEEE42300377.
Musikalisch durch den Morgenkreis: Herbst & Winter - Das Album für die Krippe & Kita
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9031419a2c9b7a65343ca86eff01cebe4fe59c3579968a8e3b50fb124ee709. 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/DEEE42400001.
Musikalisch durch den Morgenkreis (30 Kinderlieder für die Krippe & Kita)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea75621a678cc517aaaa456d6c7e6eefc40d40f15b8c0bc966dd212dd338438. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/DEEE42400370.
Du bist hier willkommen (Schön, dass du da bist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda06b763e1adbb46fbf6ef5bd28b0462176e2e34b5f9d10c8917d4c00294f3bd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEEE42500037.
Kleines Lichtlein - die Lichterreise (Taler, Taler, du musst wandern) [Lichterversion]
Kleines Lichtlein - die Lichterreise (Taler, Taler, du musst wandern) - Lichterversion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875300946d30a8c868b96ca3f5e19337aadf14946be69289d84c496b2d4d9d44. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEEE42500181.
Wenn die erste Kerze brennt (Bruder Jakob) [Adventsversion]
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 0x123e4e55d827ca7ff0e865f28a779f4c9386ce0b016d070b65fae3c5e38b7094. 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/DEEE42300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920f6dd0f4840117523e71c9c6b6eac155f191836cbd64e17d8631778953db3a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEXK12200003.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123e4e55d827ca7ff0e865f28a779f4c9386ce0b016d070b65fae3c5e38b7094. 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/DEEE42300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb7e3274c1c5cb686ff30fe13f288e6140ccb24d215b0cf88f8edb221c6bf16. 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/DEEE42300013.