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 0x567361706f5c8340353a58056bb5759a2934849e02dc669a89bd271c30a1621d. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d573bd75-ce11-4c9f-84dd-67db47de8a5e.json and https://artists.proofprofile.net/proofs/artist/d573bd75-ce11-4c9f-84dd-67db47de8a5e.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 0x2c0b824eed215a6e86103ac28982980931c0019204d326bf6bbc189b4f2a9a9b. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:48:27Z), 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/UKBWX1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1caa4219a9ff906a14f5941c6c12d5b3f01fbf9bab275cb4dd5e1d1f97a01b8. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:25:47Z), 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/UKBWX1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2042ad2b0bfa3a41ef652a3d00d2b4689f03caf3af761ce916ed75e26d60b346. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:50:59Z), 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/UKBWX1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dfd25c29bda4b2d48927c13dec2338a197856507ca34ffd233095e546d7b20. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKBWX1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091fa7fc5f76c8f09709ef317124b1a6010f45b2e8659025d0ce5b9233970bbc. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/UKBWX1500010.