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 0x4f3f84e1841b66ae29cffe04a5445245c03888925d9c4e2efc8b21b9cd120edc. 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/bddd8560-c7c0-468b-b17f-ad00bcadc987.json and https://artists.proofprofile.net/proofs/artist/bddd8560-c7c0-468b-b17f-ad00bcadc987.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Im Land der bunten Fantasie - Lieder zum Tanzen, Träumen und Mitsingen
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 0x69c0ae4fef48e796549ab55096a5c62768569e2dad1bf39bd5e65474e24915a1. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DEEE41400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704789ce0de620545f2472b6648a9e6ba5960d40149eea627626a382940a0011. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DEEE41300143.
Rennschnecken sausen und andere Cattu-Hits
Marie, Marie, Marienkäfer und andere Tierlieder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38e4704c334df1d57af53526177ba89e2d76032b527ef0e76f4e7f0d6711798. 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/DEEE41700082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eae64cc9b9bdb389d0e853a5079ecdf6e54a98a7cb585c53c208d033fa1c81. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEEE41700083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cc259c0358eadceaaacc1a244e1b8027753915739455ee5ae67b6bab600fd0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DEEE41200022.
Traumfänger-Lieder: Kinderlieder zum Träumen und Entspannen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc59d135066acf79bd5173fb5fc54bc82e2215fa357e2ab10871f65850140859. 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/DEEE41200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86cee7bcda7eebf0e7f503701ca948a017389e77f76f12fd87e9a1b6788736f. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/DEEE41200033.
Herz-, herz-, herz-, herzlichen Glückwunsch - Kinderlieder zum Mitmachen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfb30ba73687b182922406a43228443565638ba05f97a23961e578494763f9b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEEE41200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704789ce0de620545f2472b6648a9e6ba5960d40149eea627626a382940a0011. 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/DEEE41300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a00a8a83073b731520124c1ded1e366a5966d9292076281702cb02b8bf2e57. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEEE41200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c6126e8de8623e5987f733c92b6c079b3f96977f84453a8f0d11b6224ca105. 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/DEEE41700085.
Traumfänger - Lieder zum Mitsingen, Mitmachen und Träumen
Die ganze Welt ist voller Farben - Lieder für Kopf, Hand und Fuß
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86cee7bcda7eebf0e7f503701ca948a017389e77f76f12fd87e9a1b6788736f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEEE41200033.
Ich fange alle Blätter ein - Wunderschöne Herbst-Lieder zum Mitsingen & Mittanzen
Pilze suchen, das macht Spaß! - Ferni Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89579d628ae69db6061f3cabd09ed9d530403e26895626b258ccbaaf333d55a1. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QMDA72576898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100ced5ccc8a14b066302b952ab4c18912e640a7829b06f58996ec7d75fb80bf. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QMDA72576899.