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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712195adf0aceb6c77f33fd4c1e2cde9b09dee25e69469df939773cbaf7bac3f. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14316eca-237a-46bc-a07b-6da7397275b2.json and https://artists.proofprofile.net/proofs/artist/14316eca-237a-46bc-a07b-6da7397275b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Una stravaganza dei Medici (The 1589 Florentine Intermedi), I. The Harmony of the Spheres: 1. Dalle più alte sfere (Antonio Archilei or Emilio de' Cavalieri)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0b1ccdd9bce32e565c010974013f640ec1983a345b1befcce1f7acb0a46546. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAYC8601779.
Una stravaganza dei Medici (The 1589 Florentine Intermedi), I. The Harmony of the Spheres: 3. Sinfonia a 6 (Malvezzi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe065357daaa11f16d334f1d0551df093e494c95c61ee99e7ef99607f9229e3ec. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBAYC8601781.
Una stravaganza dei Medici (The 1589 Florentine Intermedi), I. The Harmony of the Spheres: 4. (a) Dolcissime Sirene a 6; (b) Non mai tanto splendore a 6 (Malvezzi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c822a62b04d48a310effa0ffbc24ae775787242a3196d7eb9f8254b9638135. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBAYC8601782.
Una stravaganza dei Medici (The 1589 Florentine Intermedi), I. The Harmony of the Spheres: 6. Coppia gentil a 6 (Malvezzi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8241cf59ace142e85fcf87f99af077851ff994d2499d8ccf8f48cd04e42578. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBAYC8601784.
Una stravaganza dei Medici (The 1589 Florentine Intermedi), VI. Jove's Gift to Mortals of Rhythm and Harmony: 5. O che nuovo miracolo a 5; a 3 (Cavalieri)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8974cf7162cee69823e3849557ab74d457eeb8fadf1a4300bd313707c75116ab. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBAYC8601812.