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 0x0e01d1640e57eb3b10b7845c30957d36b698de8b08ae78044e142ba82f081387. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76b0f226-40eb-42f7-b68b-55f90ad733bd.json and https://artists.proofprofile.net/proofs/artist/76b0f226-40eb-42f7-b68b-55f90ad733bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Il Sedecia, Rè di Gerusalemme: "Ahi qual cordoglio... Doppio affetto"
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 0x77dd6ff00cda9985fba39ed95e3639243b5fd19abf81a6de590bf5cee029af6d. 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/GBBBA0540810.
Il deliro amoroso "Da quel giorno fatale", HWV 99: Sonata (Introduzione)
Handel: Italian Cantatas HWV 99, 145 & 170
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af8b1ae5b6540b1bde71b48bdb33042b8f6d1cc71bb026fcbdee8e04c5cc311. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF059905061.
Laudate pueri Dominum, HWV 237: I. Aria & Chorus. Laudate pueri Dominum
Handel: Dixit Dominus; Salve Regina; Laudate Pueri; Saeviat Tellus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e5276d89df4ca0f54158b37067b5578c525396df5d03311585e178c9e1d77b. 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/DEF059804021.