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 0xa6bdc5a492922e1d7989da428cb0b637f60e3edf27abb0037e13bbe683701e40. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96130b3a-bc6a-4f13-bd18-4d7baadb878b.json and https://artists.proofprofile.net/proofs/artist/96130b3a-bc6a-4f13-bd18-4d7baadb878b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Liszt Complete Piano Music, Vol. 34: A Faust Symphony (Version for 2 Pianos)
Liszt Complete Piano Music, Vol. 26: Dante Symphony & Dante Sonata (Arr. for 2 Pianos)
Eine Symphonie zu Dantes Divina Commedia, S. 648/R. 370, "Dante Symphony": I. Inferno
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 0x73dd7eba83ffcc7a1574cc8cdce95b640144ef17c99ef0d1d4f6fd82c683f336. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKI190743902.
Eine Symphonie zu Dantes Divina Commedia, S. 648/R. 370, "Dante Symphony": II. Purgatorio -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa8ec919b3b5a23aaaa67936d9a6dd0d235c7877ee3afb14c0ec6aa962aab39. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/HKI190743903.
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
Eine Symphonie zu Dantes Divina Commedia, S. 648/R. 370, "Dante Symphony": II. Magnificat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9840f83670f8c8eeeb51b914c238760e761afed01e00e6668b1b3326ed89f7c8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKI190743904.