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 0x5a3d0f4ff6ea2aa94a6d7f6b305c51f84e952951ab1e7f3ddf3466b039b035d7. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/883bfd0c-0776-44cf-980b-dca9a3bdab1f.json and https://artists.proofprofile.net/proofs/artist/883bfd0c-0776-44cf-980b-dca9a3bdab1f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Unplugged on the couch at Radio TFSC (Live)
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 0x28717aee54add43768222e6ae722b4426a31f474ad548562941762309a04d0a3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:33:57Z), 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/SE6SA2024329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8192af6642a4b2bf0fec68ca68b6224ea0d36a57d8dbc43af65bf2eb88476b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:58:38Z), 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/SE6XY2196056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb63379b4fc6f18bd84d5d51a2d7755a7fde64e6da7fc3baf122e2d1b32e71c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/SE62M2255732.