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 0x89aacb6c9ae8bd7136490a7e5e0602f76e9cd9f0ca402e1544a3bad1a1e90c33. Chain 2 (Bitcoin): anchored in block 953982 (2026-06-16T17:42:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c8e17b4-5566-40b9-b006-49ce504bb1f4.json and https://artists.proofprofile.net/proofs/artist/2c8e17b4-5566-40b9-b006-49ce504bb1f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Give a Helpin' Hand (feat. Joey Tempest, Robert Ernlund, Björn Lodin, Tommy Nilsson, Joakim Lundholm & Malin Ekholm)
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 0x5ad0aff1907b79a3ca5dc38b430638d7109c8c5b96f96fa71fcfe91254ffa39f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEBGA1600912.
Give a Helpin' Hand (feat. Joey Tempest, Robert Ernlund, Björn Lodin, Tommy Nilsson, Joakim Lundholm & Malin Ekholm) - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587308c1c3c73bcb7ccba3fdf8011b070a12b50fd9171cedc909c22721282803. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEBGA1600913.