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 0x91ed570dd8269e0ff23ba06f9c15018dc42699dfd5cd30add52141677f61818a. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c41af84-50f0-4ee4-9865-8c3dd83e12ac.json and https://artists.proofprofile.net/proofs/artist/4c41af84-50f0-4ee4-9865-8c3dd83e12ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Il Salotto Vol. 4: Il Sibilo (The Whisper)
The Bartered Bride, Act I Scene V: Introduction. Polka
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 0x9719900014f681e8161f1936fad32da5233160d7bcbde6bbd4a30e6c8c9d2483. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLWD0510214.
Faust, CG 4, Act IV Scene 4: We seek the soldier's immortal prize (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc805d86dd885d4d44d57d217968a13b83e40a9443aa3d704092ab4de83cbc0f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBLWD0211612.
Roméo et Juliette: "L'heure s'envole..." (Introduction)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa8c79b7f31b031ef1a6c549c408862e84ca331a3e51682cec6fd50a9a696d7. 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/USBC19605333.
Puccini Passion - Opera Arias in English