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 0xa3e2714cadab05155a8a37e8bf7e660acbe0ec01b6b4388a4224dedad8d81239. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef9d32e6-8fe3-4bb9-badc-99d89bd5f141.json and https://artists.proofprofile.net/proofs/artist/ef9d32e6-8fe3-4bb9-badc-99d89bd5f141.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 0x21a275b4f78e1ecc40db76362526727811ca783ac20f94b676e3fecad5c1bdae. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:56:48Z), 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/TCAAY1177592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4197f36bf73ea06faacfc835c4c7a306f0c0f81274ea724ed1e2ddcecb8505f2. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:41:01Z), 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/TCAAY1177594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea83c1dd8f225430f2ff40936cd49c7373734a47995c6fcc7a29530b42cef546. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:45:23Z), 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/TCAAY1177595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a1be01480edb9d9aac86cca3dae9d638520b80bcdc115960afa6d0c9543ea4. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:32Z), 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/TCACX1780656.