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 0x9c6aa7e4cb52551330460c9ab193a49fbc2f1384588992d0ceb864b2aac16b76. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb068d0b-e6c8-4270-9972-fea6cc7ec527.json and https://artists.proofprofile.net/proofs/artist/cb068d0b-e6c8-4270-9972-fea6cc7ec527.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carlo Magno, Act II: Scena e rondo. Ecco o numi compiuto… Ah quando cesserà… Lo sdegno io non pavento (Vitekindo)
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 0x10dc3492b6156101d3b23f08e7d9a753656165113ad7f09e64e2ef5e2c326254. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FXR522416204.
Andronico, Act II: Gran scena. Di grida insolite... O solinghe dimore… Soave immagine... Non tradirmi o bella speme (Andronico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ee7246e800ed87c19b46a3a7600a6824c467945c4b0c9382aae9bc925ca651. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:51:40Z), 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/FXR522416206.