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 0xafa9dcd84058cef773160b3bbba3d7b5f64443e39bd3b7fb86339bc5a5d13b13. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d25d84d8-d40f-4038-8a01-35788a897c90.json and https://artists.proofprofile.net/proofs/artist/d25d84d8-d40f-4038-8a01-35788a897c90.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 0xb8b850b0694a0dbac17e233f5bb7b15a10084b6e518a33af667837245a615026. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:07:57Z), 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/SEYIJ1800401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ea0b9a72aa27e7d945ae742bb18732254994be74c734ed870fcefe78d7d789. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:07:05Z), 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/SEYIJ2200611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300a0f8faee2ecd3c2d88cbf257c0c8aa08699474c3f0170e359ced14ad96a02. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SEYIJ2200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4a0cbdd84edf3dd28a844fd37fd5a41f5bd127ddbfedde9aa198d584391990. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:15:07Z), 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/SEYIJ2200604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7389d133a82f349e7213743a453a8e5979f23b80b50049eadc066f3dca87f2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/SEYIJ2200607.