thumb|250px|right|Portrait in Hamburg town hall thumb|250px|right|Triumph of Marcus Valerius Messalla Corvinus from Krasiński Palace in Warsaw thumb|250px|right|Equestrian statue of Great Elector in B
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 0x3d9881455d407a3f0c79bbe617bf43200d2904bc482babe71e7f814089fe4235. 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/144e6e14-9443-44a9-a7b6-d306039d554e.json and https://artists.proofprofile.net/proofs/artist/144e6e14-9443-44a9-a7b6-d306039d554e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fußball und ... 2: Fußball und noch viel mehr!
Fußballprofi 2: Fußballprofi - Ein Talent steigt auf
Fußballprofi 3: Fußballprofi - Ein Talent wird zum Star
Track 2 - Spieler gesucht! - Fußball-Haie 1
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 0xbb7470b8f9ccb68aa67e7afb1e6fbb11a4b6505dbd9bb3af5b02bcc1e8b1d8d2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEZU12196542.
Fußball-Haie, 9: In der Abseitsfalle (Ungekürzt)
Freundschaft oder Sieg [Fußball-Haie 10 (Ungekürzt)]