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 0xb660a5257d9bdf73a2cdd8666d9be9e92eb594ee56386ad5b0742ca4291a4821. 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/6671be90-4189-4efd-b821-0aa965dbd383.json and https://artists.proofprofile.net/proofs/artist/6671be90-4189-4efd-b821-0aa965dbd383.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 0x47deb2671e9e22e055772a167c4f870918cd8a2f685713edbbd48d5e85ba5dd8. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:04Z), 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/JPI101101495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47deb2671e9e22e055772a167c4f870918cd8a2f685713edbbd48d5e85ba5dd8. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/JPI101101495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9929de02a6e2a6b2bff1a98c34990e4499b4fd010ebcc26fb43dec5f725a16b8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:00Z), 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/JPI101202183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccee1f217602df8814e8323601b7b2594ad78c3d87ccdc7e95fd7116291f4af. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:16:34Z), 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/JPI101601529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931a90093ce708185de657f4fea24954e9ba7262ae22bc12028988dc573bb76b. 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/JPI102103133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23db435bdf5bd5ddd71fec70fadfee8a264714fa0dbd359edf9e4926bc507c28. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102300345.