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 0x5c565af17c61bec016de1453d98afe523960155df0f37b301b4d7343f667311c. 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/eae0444e-212c-4b6d-b755-de564e3f0af2.json and https://artists.proofprofile.net/proofs/artist/eae0444e-212c-4b6d-b755-de564e3f0af2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
04: Mal groß, mal klein / Die Schnitzeljagband / Lila Fischlein / Supertolle Freunde
06: Lauter grüne Daumen / Tyrannosaurus Trex / Kleine Zahnfee / Im Krikelkrakelland
01: Eule mit Beule / Regenbogenrätsel / Schatz Ahoi! / Die Farbe Rosa
05: Kleiner Indianerjunge / Backe, backe Kuchen / Spitzentanz / Quietscheschuhe
03: Verknotete Arme / Sonniger Sonnentag / Spuren im Sand / Schweres leicht gemacht
02: Dschungelsafari / Schneeflocken / Das große Autorennen / Der Klang des Echos
08: Fleißige Handwerker / Zauberer in Not / Torteneistanz / Das seltsame Päckchen
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 0xf7f6cddabfa27eb3e6fb8dfea65dc94f69318ad3f7fcb770a85673ce942526c8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEUM71403893.
09: Bücherschätze / Fußballtricks / Bei der Feuerwehr / Hopp, hopp, hopp, im Galopp
07: Reise in Märchenland / Die Jagd nach dem Ei / Rettung im Schnee / Biber am Fluss
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11bd9168c37a194d072216fa343fce6f44fa46d37cb045d899f9afa43028aee. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/DEUM71403898.