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 0xcb6d94935c67634f3d52711d506f3ddca4ea4656a02a4848d2c8edf4cefcd279. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5df4c4e9-92af-416e-be0b-5becab4d42eb.json and https://artists.proofprofile.net/proofs/artist/5df4c4e9-92af-416e-be0b-5becab4d42eb.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: Sinfonia - Non perche congiurati - 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 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 0x2d355a875873d0b43c95366838c613d531728e6675dd5b959f3ab6040b2780f7. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEE471700377.
La liberazione di Ruggiero dall'isola d'Alcina: Scena I. Sinfonia - Cosi perfida Alcina. - Scena II. Qui si può dire - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa322005ddd5fd136742fa88247d6bcacea564eae1c9d48b14350052b40a5b80. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEE471700378.
La liberazione di Ruggiero dall'isola d'Alcina: Scena II. Quanto per dolce, e mia beata sorte - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6821973ea2d13b2a29377147562f73c9304c5aaa9d9074426af4a2e5c96265. 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/DEE471700379.
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.
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. O quanto è dolce amar beltà pietosa - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3666a1a82b6f7b4d72ab6158852616a9fc9045a96587dd72b9ace3050c78982f. 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/DEE471700381.
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.
La liberazione di Ruggiero dall'isola d'Alcina: Scena II. Chi nel fior di giovinezza - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee0002230303c98122f48d74753703fe22cbd258e12cbbdd5a757749b3e0984. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/DEE471700382.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137038466ba435944da32398f757201cc25f31c1d943715d159b5d57d0414797. 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/ATBV72568150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d184c8861d7b15912dd96e44c358521c787571754a2c91d87540dcd4c0de398. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ATBV72568153.
Missa Le serviteur: 8. Cum Sancto Spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ba1d99d289a0fab4e6934a9cceb1509cdcc8d22ba5070d249cb0b80f88bf00. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ATBV72568155.