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 0x2cc9c0caea9c7253ec79dc84bc69a93109a8d0f350fdff9a68d64860f3283ee6. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce049335-885e-493d-9a55-b7acbf2a0ee1.json and https://artists.proofprofile.net/proofs/artist/ce049335-885e-493d-9a55-b7acbf2a0ee1.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 0x2e1fe33d04dea51b5be3d5103c524e25266fc26a32565376ac8d517c79e81af7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEKU31200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8378bb3d7e19e657f4e841ebc4aefe48ee5cb7ba809f84f503b4b4cff24e31. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:00:09Z), 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/DEKU30800148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e301814bd9aa440a47258042df5acba6535bf168a0bdcde0917aac6c6fa345a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEKU31300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571749f94e00d595736f23095dc457754977b6cb11f29ec4de654bb695bd2b61. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:30Z), 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/DEKU32300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd0e2e6494f4e635b00c5edb86bacce7fbef0984d2759e4e3c9245fa7c1a312. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:54:31Z), 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/DEKU32300091.