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 0x258f85647e10652f8129fd30aa35238f69a01db26a8bfac1b050c3689ecb4166. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b0e00db-7d87-4669-9eb0-23fd7f4682b5.json and https://artists.proofprofile.net/proofs/artist/8b0e00db-7d87-4669-9eb0-23fd7f4682b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Fledermaus: Act I: Duet: Komm mit mir zum Souper (Eisenstein, Falke)
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 0xf00658089d930429b5687ddd9a162216825f8a595fa28e2c38e7fce59d0c5c16. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB261300075.
Die Fledermaus: Act II: Finale: Bruderlein und Schwesterlein (Falke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b39183004c506b0a602abd7fc9c5d3d537e6195540a8d2764304fb31be6eda9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB261300085.
Die Fledermaus: Act II: Ach, meine Herrn und Damen - Mein Herr Marquis (Orlofsky, Falke, Eisenstein, Adele, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c3b820936f448dedc1acc36029c6357954e758b2fc18259a0501b7d93bf9f7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEB261300080.
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
Die Fledermaus: Act II: Finale: Genug damit, genug! (Orlofsky, Eisenstein, Adele, Rosalinde, Frank, Falke, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85c688b78e7b89cde5cacbeb4acc2d295a3c62da2669526c926a14703488618. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/DEB261300087.