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 0x281027b047871d51964b52035a0c00d89405b8348674bdbf59d3200d43daaaea. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbdfdb05-b604-412f-b101-3fe0e1eb487f.json and https://artists.proofprofile.net/proofs/artist/fbdfdb05-b604-412f-b101-3fe0e1eb487f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Riccardo Fassi New York Quintet (feat. Dennis Irwin, Adam Nussbaum, Bryan Carrott, Gary Smulyan)
Verdi: Otello: Atto Terzo: Messeri, il Doge
Orchestra dell'Accademia Nazionale di Santa Cecilia
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 0x43a9e42c537de8cbd15259b196e733ad7a6c382f93b1c251aafa06f29794e1f1. 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/USSM11914502.
Verdi: Otello: Atto Terzo: A terra! Sì, nel livido fango
Coro dell'Accademia Nazionale Di Santa Cecilia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889103b8c6b68f5b2c28c9c63262cccb696cb6546a4e84e53a61bba571cc7e9f. 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/USSM11914503.
Verdi: Otello: Atto Quarto: Aprite! Aprite!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8683b747ad415207caf5be6080bb46ae32bd3fb81fc70008768fd69d6b3465c7. 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/USSM11914513.
Verdi: Otello: Atto Terzo: Il Doge ed il Senato salutano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b34daab9cd0a501d1af7057f9b486104a29b23034b44f7925c18f8c007c8f8. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USSM11914500.
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
Verdi: Otello: Atto Terzo: Messere, son lieto di vedervi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d71da4c2c4b029d4a59efa92a8133592071174007f81887aab0d7f245843c2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USSM11914501.
Verdi: Otello: Atto Terzo: Quell'innocente un fremito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64ccfef9a7d3e50b7ba0a2b6a1a1f79c02c0502446be99a25fc0654d5c276c4. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USSM11914504.
Verdi: Otello: Atto Terzo: Fuggite! - Ciel! - Tutti fuggite Otello!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7a2728eb209e2de058a7c401d449901c517a77c20afbfe708d27641b22b2bd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USSM11914505.
Verdi: Otello: Atto Quarto: Niun mi tema
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16283268d6b6663d0763fc955a8e63d7728d942d3de1f5c0e065c9b1071f665. 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/USSM11914514.