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 0x0ed52a40b4422034542ce0c8f01af23d7daa29d6c09d1bdc8d90c8123b8b1d97. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c67a5c4e-e8d8-4799-944e-b5bb1698b372.json and https://artists.proofprofile.net/proofs/artist/c67a5c4e-e8d8-4799-944e-b5bb1698b372.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jakob geht zum Schwimmen - Jakob und seine Zahnbürste - Jakob ruft Stopp! Lass mich in Ruhe! - Jakob übernachtet bei Oma und Opa - Mag ich nicht, ess ich nicht!, sagt Jakob (Jakob, der kleine Bruder von Conni)
Jakob und der Osterhase (Jakob, der kleine Bruder von Conni)
Kapitel 1.1 - Jakob und der Osterhase (Jakob, der kleine Bruder von Conni)
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 0x7d312e781622e8aebf20899884687598082e7aca64f1bc4cdd1203c97e882035. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEXQ81869015.
Kapitel 1.2 - Jakob und der Osterhase (Jakob, der kleine Bruder von Conni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1014229e80f17aa4d90438faba45e6658d9c19c11b6a607c8b85ef858faa8fbf. Chain 2 (Bitcoin): anchored in block 957839 (2026-07-13T10:06:30Z), 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/DEXQ81869016.