1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x925839f13e3832ac025aee72be2242d07dcb474f808a4598bf5da9ece94c54be. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d901e67d-28ed-43aa-acc4-2ac9e88bcd50.json and https://artists.proofprofile.net/proofs/artist/d901e67d-28ed-43aa-acc4-2ac9e88bcd50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Deutscher Nationalreichtum (Fallersleben)
Vater Rhein (Take Me Home, Country Road)
Gelobt sei das Gras (God Bless the Grass)
Schon dämmert in der Ferne das Morgenrot
Hein & Oss sing Songs from the Hambach Festival 1832
Hein & Oss - Partisanenlieder (German Partisan Songs)
Das Wirtshaus auf der Höh' (nach Wilhelm Busch)
Der Sang ist verschollen (Fahrender Schüler)
Zieh, Schimmel, zieh (nach Rudolf Baumbach)
Im Krug zum grünen Kranze (nach W. Müller)
Ukrainischer Holzschnitt (nach Walter Mehring)
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 → block OTSBitcoinBlock must exist at that height 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 0xf111010f0669565bca7f0eb378fb2d5b5630d228dbaee7ae48066699b8591294. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEBR61999012.
Hein & Oss singen Volkslieder - Auf den Plätzen, in den Straßen
Feinsliebchen, du sollst nicht barfuß gehen