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 0x5dc503defc07d0ec7d6800bde3ac976af441ceb046c8d9b12262adaffc859323. 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/33e038d4-92f3-47fc-ba24-93ffa0c34f10.json and https://artists.proofprofile.net/proofs/artist/33e038d4-92f3-47fc-ba24-93ffa0c34f10.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Verdi: Macbeth, Act 4: Duetto. "Dove siam?" - "La patria tradita" (Macduff, Malcolm, Coro)
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 0x2fd9a5e5b343d1cacae195096a1465011cb0b03066ebf3bdc1317409aed035fb. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBAYC2400804.
Don Giovanni, K.527, Act I: Quartetto. "Non ti fidar, o misera, di quel ribaldo cor!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb6db2b339b996f4d4e9c607be758cb932d5a55d31df1e393f6b7228dc0aba3. 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/FR50X2302601.
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
Così fan tutte, K.588, Act II: Duetto. "Fra gli amplessi in pochi istanti"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5cfd6d40438102256d85dcdb9264923112ac7a9e4f3696cb0933325515c9fe. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR50X2302608.
Così fan tutte, K.588, Act I: Sextetto. "Alla bella Despinetta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0a2ea0e91ef41ce7ae3230c2a9eab0bff82aa1dd986aaa13292cd7d7ee8588. 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/FR50X2302612.
Le nozze di Figaro, K.492, Act IV: Finale. Scena ultima. "Gente gente, all"armi, all"armi!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e068b0dd5a45be472e992e13cc50eeab3cab15f7b2996707f930ff87ea44c4a. 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/FR50X2302617.
Mercadante: Il bravo, Act 1: Duetto. "Non sai tu che non avrai più del ciel" (Carlo, Pisani)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1046d6258b31aecb6f4a417d31f83e17cae0b10805ce5525814c9a78636c0807. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBAYC2400809.
Halévy: La Juive, Act 2: Trio. "Tu possèdes, dit-on, un joyau magnifique" (Eudoxie, Éléazar, Léopold)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad9b37c87680b24ad34cd40918be9007e93947f38d2a4de1635f0a037deee2f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAYC2400814.