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 0xe1e697e3a18dba3230f1280ca7062235a8e41d243e177eebda07b453a21c5e4a. 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/eaa3fb56-1c23-4eed-9620-cad77be42aea.json and https://artists.proofprofile.net/proofs/artist/eaa3fb56-1c23-4eed-9620-cad77be42aea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Eule mit der Beule – Ein Liederhörbuch für Kleine
Kapitel 9.2 & Kapitel 10.1 - Die Eule mit der Beule – Ein Liederhörbuch für Kleine
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 0x843b3919d91b51752c1615a58429b70e1acd082b57e95b98f0ba61cb2a551b37. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/DEWM51222519.
Kapitel 10.2 & Kapitel 11 - Die Eule mit der Beule – Ein Liederhörbuch für Kleine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9424cb1435f53c7c09f0be68fb4bf14b8fcf179de5fad24a16351ace673fc2. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM51222520.
Kapitel 1.1 - Die kleine Eule feiert Weihnachten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ef601368f8a7cf6b46c46e6f5cf51c9aa3cdd6576f712d2c4f0ae332ce11f1. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/DEWM51220736.
Kapitel 1.2 & Kapitel 2 & Kapitel 3.1 - Die kleine Eule feiert Weihnachten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df4b7f65f0da4b13939d48c732509d853944f8646470dfe0380ac127c104c4c. 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/DEWM51220737.
Kapitel 3.2 & Kapitel 4 & Kapitel 5.1 - Die kleine Eule feiert Weihnachten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbed7c27a5b4a478dd8554ce5cf0fdfb3e57a28316ec071facb60217b8164c8. 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/DEWM51220738.
Kapitel 5.2 - Die kleine Eule feiert Weihnachten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c72f77149db63730175fbe4421d1131296f02fd108fa86cf1a4fe449449e5c4. 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/DEWM51220739.
Kapitel 5.3 & Kapitel 6 & Kapitel 7.1 - Die kleine Eule feiert Weihnachten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d85bfc43eb222df26bab6479959c14558972975e2f4c40fd79c6d83a9a9161. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/DEWM51220740.
Kapitel 7.2 - Die kleine Eule feiert Weihnachten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eeefbf209cbacf4bd96a066b3cea496bad88295a9ff11f334b15e7873e2829. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DEWM51220741.
Kapitel 7.3 & Kapitel 8 & Kapitel 9.1 - Die kleine Eule feiert Weihnachten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d0c59b83a817c6af69bc058f9cb8ce387e62dba40304a3fab8da11ec6f333e. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/DEWM51220742.
Kapitel 9.2 - Die kleine Eule feiert Weihnachten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb330e212bea907fd33d6a702c0f923a3865bc5c7363783894227aa21ebb86697. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEWM51220743.
Kapitel 9.3 & Kapitel 10.1 - Die kleine Eule feiert Weihnachten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b6d7c05a66879099feb81e1e266f9178e7e7056bbfe15a4bba24b6600f2d55. 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/DEWM51220744.
Kapitel 1.1 - Die kleine Eule fliegt zu den Sternen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b328a0beb018e7f1f27382437bc0914d710dca6b1bc27de20f9c0bcf5ffef7. 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/DEWM51223820.
Kapitel 3.2 - Die kleine Eule fliegt zu den Sternen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0ff2afef1af6c2372d387f986747064887835e6eb01e95fd1d967abb5e0958. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEWM51223822.