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 0xf9e85982b049f38b30c2215069fcb8a429e631eba6f562d19708a1a65e26d7ab. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f034085b-e378-4891-b879-e885c42fad79.json and https://artists.proofprofile.net/proofs/artist/f034085b-e378-4891-b879-e885c42fad79.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x526f9e1eb8d663652dd0bb56f5a60d9a0aea9a2654e7f70d1432b8bff024def8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:46:01Z), 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/QZNJX2162132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58aa488f2c3bd9882d6e37946425de14faf8ff4f521ed689e1056791a1fe723. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTPX2162384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a09acc4dc550ec5c95962e71749d8432d090c71996b354a5eba5d89d92a2d3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJV2255321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518344fef9083bc99bf001e11e0e0da9ecd9b5357a3c58992899532442c0951d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJW2231814.
La Cumbia Con Chiripiorca (Sonido Simba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7f4b59eb7d756c961b5821f29631a0874b578ecd3cf49bce5ee7bbdccb232e. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZW9L2424269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3701ec23304b6bf760e526d122efbed57caaf0aa5ce47125cba6c10ff957003. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNJW2312015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dfe88b87bcdb49a47e83f5133b784fc39901a16bcf03744ca5daf62a085d09. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:06:24Z), 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/QZMEP2411797.