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 0xe4ea5ba9e3704096a1f7db509418fc1241e3787db0b8663903cbe3de10355f69. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/957bd2d7-dff7-4013-b707-14af038b903d.json and https://artists.proofprofile.net/proofs/artist/957bd2d7-dff7-4013-b707-14af038b903d.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 0xa758f047be7954bcaf2b9ba60e093c52ad77a11c650a735a8a9fd4a31206b6cf. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBAAA8700423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b382dd66468ea8eaa592d123a7c901216172ee3aba73e582e33eb2b784534e5. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:34:38Z), 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/GBAAA8700424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff9c64c6fe62cb97cc58493d2e9f46bca7ab21c031759959bf6781a0c904b10. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:53:50Z), 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/GBAAA8700428.
Video Anthology, Vol. 2: The 1990s [(Live) [Audio Version]]
Video Anthology, Vol. 1: The 2000s [(Live) [Audio Version]]
Live at the Schauburg (Live, Bremen, 1987)