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 0x443480ec4db3320ee84506cfca63b11a9f249fbadcfee3bb05387dbb063ddf98. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf2428cd-579a-4709-a519-be8e98149737.json and https://artists.proofprofile.net/proofs/artist/cf2428cd-579a-4709-a519-be8e98149737.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xf070ca5c9ef8bf2c92a3b3029566e39db3bbe10708a1562cc93543c6f16aef76. 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/ES7891800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d95bcb935749530e13df651f32bdee299bc998776ab1a2415b509bf5fb56372. 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/ES7891800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6337d5ade53e1863c7e1016e457e9ccdd9cdab7960017909e801794350545a7f. 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/ES7891800205.
San Giovanni Battista: Soffin pur rabbiosi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b87d6bb39a1f2288cb5c5726ea65483673258f5155484f82ce23fb4159dcf7. 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/ES7891800206.
San Giovanni Battista: Io per me non cangerei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeeeba0619abecaa41637d9a2fda75adcfc5906e8bec7f42b23e1c90547d798f. 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/ES7891800209.
II ratto delle Sabine: Sorgi o bella da le piume
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7a3b8853da2085a68a253bea0e4f79a896ea8bd2701b1e2bbcf3580c4fc245. 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/ES7891800212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cfa4d81fbd4ac0e340b6a5c052f49d1b610fa695f2833ea8fb0ee6a70508f0. 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/ES7891800225.
Bajazette, Part II: Aria: Fra il mar turbato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bbaa49ebfc564bddcb98a3c0357805d59dc8dade63e0a726164becc6663a6a. 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/CH1491635201.
La clemenza di Tito, Part II: Aria: Se mai senti spirarti sul volto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d46abdb938cacfbbecf0dced00deafe9fb55f29727ce69e3147e4a2e01759e. 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/CH1491635202.
Pelope: Pelope, Part II: Aria: Salda rupe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48a52f990166610292f3c6a22c7e184779278c6a7e6f9d6548250abccdddbdb. 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/CH1491635212.
La passione di Gesù Cristo, Part I: Aria: Come, a vista di pene sì fiere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e369f81c88d142d5f5c6b3bed065ab85ddd453057ec0dc2810439a44b3e1877. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/CH1491635203.
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 natività della Beatissima Vergine, Act II: Aria: Pastor son io
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ea0784869085b23d6154e2d08c3e157e2e7fd97224d8c586273f1154712ff3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CH1491635204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2b24b92d588bbc6ba65df2c89b7e87b38bfe3dc14c23ac88de95ec50f4c81e. 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/CH1491635205.
Lamentazioni del profeta Geremia per il Mercoledì Santo, Lamentazione terza: Le Lamentazioni del profeta Geremia per il Mercoledi Santo, Lamentazione terza: O vos omnes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0828dd0a07dfbb909c6ded817390b8dbedc2d7fc992a863d42b3d57f1e8706. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CH1491635209.
La passione di Gesù Cristo, Part II: Aria: Ritornerà tra voi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c4c49425a50dec5a3ae28fafd6156f1c4cab2b23552d4971afefd41d439b8c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CH1491635210.