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 0xe767af8c58e6bf5a1bebaa1a2d23d84b29d3cdcf4572bdee36dd48bee2cd83ad. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a80104d0-1cd0-43b7-bbb2-09be72d0e25b.json and https://artists.proofprofile.net/proofs/artist/a80104d0-1cd0-43b7-bbb2-09be72d0e25b.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 0x0f0a7401d4a8b0857b99985206ce89f0b3f11170c0dfd6d1c1c1ada65ee87a9c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:20:43Z), 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/QMAAK1618923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7793eeaea4f752afbe0aa94686e401e5ca4261944ea027a025036dc047603de3. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:03:08Z), 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/QM9AA1819652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28e2da84e944a24d1cada38c1d1cd258b3bbcc02b7a49c199e3a8b3656d14bf. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:39:18Z), 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/QM9AA1819656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44bc87172b2179d1daf9ebdb84268b325aef5c7c58adb2572bb6c30c21a5818. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM9AA1819661.