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 0xf88243c3301da4a37c0d896ec31052f3bd3dba8d090882b612bd0314974b6264. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31445bca-aa09-40c6-b24b-4b0528db4937.json and https://artists.proofprofile.net/proofs/artist/31445bca-aa09-40c6-b24b-4b0528db4937.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Explorations for Saxophone and Electronics Remix
Gubaidulina: Duo Sonata / Denisov: Sonata (For Alto Saxophone and Cello)
Minimal Hard Rooms for Saxophone, Piano and Electronics
Giovanni Nardi: The Killer and the Rose for Saxophone and Electronics
Giovanni Nardi: Snapshots For Soprano Saxophone and Electronics
Giovanni Nardi: Snapshots 2 For Baritone Saxophone Solo
Giovanni Nardi: Snapshots 4 the Eight Doors for Alto Saxophone
Spiral for Saxophone and Shortwave Radio Receiver: I. For Soprano Saxophone
Stockhausen: Spiral for Saxophone and Shortwave Radio Receiver
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 0xcdef124a55f5d2a53dd2700fe63abf894f061d03068255abd6656a396c6482df. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6542207049.