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 0x5c93340cf154bb23104b03c808c749b85dd2a2576fc0495cf748b9b055b16870. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9daf194-916f-4717-b801-97d8136d068c.json and https://artists.proofprofile.net/proofs/artist/a9daf194-916f-4717-b801-97d8136d068c.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 0xf24426a7b28ae648d84259ca4039b0cb54603a467c3c7796d307766b068a5cb2. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:36:32Z), 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/CAPUH2001007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e521a00bcf0650408b2cac8bd494a9f6c455c875e2839701fd730f3563df4a. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/CAPUH2001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d90d9cd343e21e648a64cda4e39ddac238656ae23cc60e68d8a7193df75b4a0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:14:44Z), 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/CAPUH2001006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c3ef48cf3b42724e7e582ee24ac7d3bc3009e77a48522d39d2a5ae6f5e4fa2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:43:32Z), 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/CAPUH2001009.