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 0x8a584e41a74dd406cfac565839190c82d9d43ccef9a790cf1f422bcf77939309. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcdd2bcd-fc85-4865-ac33-d70a6612ba14.json and https://artists.proofprofile.net/proofs/artist/dcdd2bcd-fc85-4865-ac33-d70a6612ba14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
3 pastori e una culla (Canzoni per ragazzi)
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 0xdb27dd3a485e7004c37fa9f31748de546ea64ec7aba5cb364a2d60771e3b58b7. 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/ITY872000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b1a3b7c86980f82b4dcf46b55ceee0e6b6d364f634b50fdb44b97fbf55d406. 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/ITY872000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b3b4b5ba284c50288de8e379ec05952754eb4e0ac38062b847847a9b7bf3fd. 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/ITY872000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf695a9c356fae9d74d7f366f40a97c52aba0f6aafc537768f3e8a46c1656a015. 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/ITY872000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23bc92ddb362e49983e52843da1959c3aeaa2a16894dea1b7e0e926260d6a79. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/ITY872000142.
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 0xa7c5a7def5639dbcc004394b9b6735687a6219b81fc82686e58fff8725bcdfc4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ITY872000143.
English Little Songs (Canzoni Per Bambini)
I lupi dentro (colonna sonora originale del film)
Le regole del gioco (Diritti e doveri dei bambini)
Incantesimo di Natale (Canzoni e spettacolo)
Una sirena di nome Serena (Canzoni e spettacolo)
Amici di città (Laboratorio di lingua italiana per alunni stranieri)
Un amico in più (Laboratorio di lingua italiana per alunni stranieri)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3f870c2bd62949033a24f2076388c9f341031cdfdb358dc2fd27e931521d7b. 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/ITY870600183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550d2b1a6d1d57793d7d4dfe73158abc9d61d4401e69251527d7e34b2e27e955. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ITY870600177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9df861731626b5eb9b4cdc5d65749c7e9e94bde108b20258fff15005bbf5d60. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITY870600186.
Amici di scuola (Laboratorio di lingua italiana per alunni stranieri)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b5b79cab5b05cbb325cc75dffa1029fa4a1b6ddd2cbde5a752ea5e1f5d2dd3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITY870600319.