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 0x1636a6454af18856de823aa866edb4fa14ad49cc58381cad9395cc528ee15336. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed9fb4a6-cefb-4d7f-8bad-5c4745d1dd05.json and https://artists.proofprofile.net/proofs/artist/ed9fb4a6-cefb-4d7f-8bad-5c4745d1dd05.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Amarimai - Il Circo della Musica Popolare- Il Viaggio
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 0x06a796d00dc5eb780a9ad0797bb3a83531255dff8a23728cd948e4011734a1f0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCADO1878841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565bae98f5fd8ed34fd51d814c3430a79605ec60b19ad292574601dc959e0fd0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADO1878846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f63c8e8df0c349cff5c2bf5aa16e2598093713a0e0fcd7941cfeef54f94643d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:33:16Z), 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/TCADO1878860.
Il circo della musica Popolare-U Cor Vatt Ancora
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb890fab8937ae52c7ce7fbaf6f05ab331f7e179503047697a18be73dd199cbfc. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:49:28Z), 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/TCAHL2313649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e408bea268180cee13d133393f00a92ab0fb4d2071d8931f84764568f4ad7d0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAHL2313725.