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 0x6c96e85c927dc978ef0a2070bbbf3b7ce7dff1ab4da1dcd8a9f69919a427393f. Chain 2 (Bitcoin): anchored in block 953962 (2026-06-16T15:03:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27bc5448-4b25-4d56-9cff-8444554d480c.json and https://artists.proofprofile.net/proofs/artist/27bc5448-4b25-4d56-9cff-8444554d480c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Paesaggi con macerie (2022) for Ensemble: Vento e Polvere
Salvatore Sciarrino: Paesaggi con Macerie
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 0xbac23a225b36b5f13e57095a0f8afc4ded75dc3dcf2e3144b030dd74cb928415. 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/ATK942202201.
Paesaggi con macerie (2022) for Ensemble: Frantumi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d96339d3fbe2782015b67e8325df0bbd29a9b63e1ec0d834464b739150682a6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ATK942202202.
Paesaggi con macerie (2022) for Ensemble: Cancellazione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698e0363920fa45e4a2e340656d32b5731c387dc2d13a1e20e0ad5e4aa4c0f92. 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/ATK942202203.
Le voci sottovetro (1999) for Voice and Ensemble: Gagliarda del Principe di Venosa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fe38a84ff5206d847a25c1cffa6edada334fdfdf5311c21df0507c435abf4b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ATK942202204.
Le voci sottovetro (1999) for Voice and Ensemble: Tu m'uccidi, o Crudele
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899f641af1e2729c8e0bd5678a5c7650c74a22631eafe1dc9cdcc750f2c07c8f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ATK942202205.
Le voci sottovetro (1999) for Voice and Ensemble: Canzon francese del Principe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61aaca25f3f68a08c7736833f3b65c49eaa9cc99ebe1b2918f8292848c953963. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ATK942202206.
Le voci sottovetro (1999) for Voice and Ensemble: Moro, Lasso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4a40dfd11351a85606ae2b782f557257980906918819572dbe501ca5ff9b6b. 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/ATK942202207.
Gesualdo senza parole (2013) for Ensemble: Libro III, XI Non T'amo - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620e19522116ae6990c42bacc09ec3a0d213f33db2048ba640f799fa05cd5a2f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ATK942202209.