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 0x83c990b8a965602b08d5b40f558f86fe6598174c4b14c02a6937d0ebbf6bd943. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4be2cb6e-4294-40b5-abc7-f3eae5827011.json and https://artists.proofprofile.net/proofs/artist/4be2cb6e-4294-40b5-abc7-f3eae5827011.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Verdi: Il trovatore (Recorded 1961) [Live]
Brigitte Klassik zum Genießen: Vittorio Grigolo
L'elisir d'amore, Act II: Una furtiva lagrima
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 0x0b3a12fc58304f97d8f66b10fcd5bab552333937fbc7239d8ed81b937894fdcb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSM11002209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb522f959d17279e6bcf0421f4a47fcab4bc850fe66d49badcd4d76551aabb40d. 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/USSM11002211.
Il Corsaro, Act I: Tutto parea sorridere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbad8ec2ac5abbfed984e641262c944c7cbfbe879699dff9e0b689c27242772c. 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/USSM11002215.
Un ballo in maschera, Act III: Ma se m'e forza perderti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7f2e5e02beaad918bd1614a6e0340d46a0ba89c4c10ebc88aeb2066036e8da. 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/USSM11002216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68aae39775c9cb067805fb1333d839066f341de540a39fb2061af92b5e3ec06. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USSM11002218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe1e6500d13b3619336c9bbda0234b80a5669767dd337e9f4bf304de4eb00e0. 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/USSM11002222.
Luisa Miller, Act II: "Quando le sere al placido"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738681872161386271ef3e0b90b59b346f25b87cd635e2d0d3d1173f1607451a. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USSM11002208.
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
Il mito dell'opera: Flaviano Labò (Recorded 1957-1969)
La donna è mobile - Die schönsten Verdi-Arien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4459c940893863df2c6adc3b3ba82e6a866e06a6056fbe98092c30b17c9d306. 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/DESB31326902.
I due Foscari: Act III: Alla gioia, alle corse, alle gare! (Coro, Barbarigo, Loredano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ca3c2f3f46604024f95a6297f2f8b8f4df4f8312b5c5532ee7ed331a65666b. 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/DESB31326928.
I due Foscari: Act III: Tace il vento, e queta l'onda (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df38cb2ec8c7c762b9b769a9af108429f21c154e7a8ff830f254d722c746a3a. 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/DESB31326929.
I Lombardi alla prima crociata: Act I Scene 2: T'assale un tremito! (Griselda, Viclinda, Arvino, Pagano, Pirro, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8d388df6a3fc32be3e9f8c9f6c0c4c3e5b528236989e7e1e911bbeee00c063. 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/DESB31326704.
I Lombardi alla prima crociata: Act I Scene 1: Oh nobile esempio! (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d1b6ab171c54361aff0703c1f6158ec106281711dbfc22a1b9f2c5bc8c5065. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DESB31326702.
I Lombardi alla prima crociata: Act I Scene 4: Vergini! Il ciel per ora (Pagano, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae84b56f836fcc8508211d582f76f40561bb42b570104f61aa36084c41b733e. 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/DESB31326707.
I Lombardi alla prima crociata: Act I Scene 4: Sciagurata! Hai tu creduto (Pagano, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a24307f010bbfd7c65332b3d58c9a7722f2a7aa2ae874d8d7d4bcc500e6574. 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/DESB31326708.
I Lombardi alla prima crociata: Act I Scene 7: Vieni! Gia posa Arvino (Pirro, Pagano, Viclinda, Arvino, Giselda, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a571a2ffc1c1a1e205247cf80e6262ea9a51ecb3a44fcb9179828210fd61d2d. 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/DESB31326712.
Vocal Recital: Maragliano, Luisa - Verdi
Un ballo in maschera*: Act I: Ogni cura si doni al diletto (Riccardo, Renato, Oscar, Chorus, Samuel, Tom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c221841b4b64755401645791160e34444ed3134e3895ccd6400efd64eb95609. 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/DESB31328109.