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 0xc75815b11b66c280079745d4c8367ca73918ec06bf94d5febaf670fba7542269. 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/4761d6be-061b-4a82-b9b4-0ed08303bf29.json and https://artists.proofprofile.net/proofs/artist/4761d6be-061b-4a82-b9b4-0ed08303bf29.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Verdi, Rossini & Wagner : Maestri Veneziani
Lo schiaccianoci Suite, Op. 71a: Danse russe trepak
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 0x0b40f1ab54f47e7fde45932897952518c2ce831023814abe61f4d3d557b8b1d7. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/FR6V80780897.
Lo schiaccianoci Suite, Op. 71a: Danse chinoise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5c40b71f6aeabb2d797768ac8f2ae7d5c7d89187daf4e0470de20ed2fc001a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:12:57Z), 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/FR6V80780899.
Il lago dei cigni : Suite Balletto, Op. 20: Valse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282fd6a589348464699648c42476678fd5b1ee50400e58d71c1985b23707bcfd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR6V80780903.
Il lago dei cigni : Suite Balletto, Op. 20: Danse des cygnes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c37e9459720b12efd73b1a981d15cf52956f3f67acde5d903f3350b2c7cf88e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR6V80780904.
Il lago dei cigni : Suite Balletto, Op. 20: Scene finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5f5078a2025543a86849ac0ff90050caaa5baf31cb80ba90eb47c5f747b923. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR6V80780906.