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 0x5654c46891130039939e9ef6823dbbf88e891663a12fb0ce0d91b5d555560eb5. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f48531d-827d-4b98-9b5a-06186fb01f26.json and https://artists.proofprofile.net/proofs/artist/2f48531d-827d-4b98-9b5a-06186fb01f26.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Francesca Caccini: La liberazione di Ruggiero dall'isola d'Alcina (Live)
La liberazione di Ruggiero dall'isola d'Alcina: Scena II. Quanto per dolce, e mia beata sorte - Live
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 0x3f6821973ea2d13b2a29377147562f73c9304c5aaa9d9074426af4a2e5c96265. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEE471700379.
La liberazione di Ruggiero dall'isola d'Alcina: Scena II. Ecco l'ora, ecco il punto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb570352a03f4798d7c1e7da0d73bce5c175c1060e61f9d87001ee9ccdfa7e1ca. 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/DEE471700383.
La liberazione di Ruggiero dall'isola d'Alcina: Scena II. Ruggier de danni asprissimi - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a12047a533e50c2aafd9a8cccc34d5d8317b4054a2c593bde5dfc286af46b1. 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/DEE471700384.
La liberazione di Ruggiero dall'isola d'Alcina: Scena II. Ahi, Melissa - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ae8794532527c865096f8cfbeafdc25b6488835a6ac440490ebab91bc67e3f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEE471700387.
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
La liberazione di Ruggiero dall'isola d'Alcina: Scena II. Rimanti, o mio signore - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac9c8d4d1cedae8dea7055ed5fb1a573b79d8d1d26791a08cf51d9c1aadf05f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEE471700380.
La liberazione di Ruggiero dall'isola d'Alcina: Scena II. Deh taci omai troppo d'amore amica - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d07e25845626cdfe674f9e361f5aa32708c3787b88920672acfac9b47aeccdf. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEE471700389.