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 0x85ae54993a27ef00b7bcedfad7f06a0da9f60b594073c6fc4d8eab1f0082bd35. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5931baa2-0a5e-44b0-a196-f251d0e27b5e.json and https://artists.proofprofile.net/proofs/artist/5931baa2-0a5e-44b0-a196-f251d0e27b5e.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 0x3bac3451db19afdafa852bfc2cad58794bfc94ab7ab40229deaf52e010dba801. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:53Z), 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/GBPS86005066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209b28992f509780024af79e38bef39ea7cff5b4e11577b5549317113217c107. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/GBPS86358662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf2ee8bfc775bce6cced45a76247b0dfd001b6ed07fe38eb11c01dd00e473fb. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:41Z), 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/GBPS86380738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6c90ab1c997ce5d2f53cdc0ea4e979f090b1e5f5f491962bb3fb649cb6d7e4. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:05:07Z), 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/GBPS86381815.