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 0xf452a0de09cddb5cc2e272426ffd7abede1a3941e11cd5b8a5e24efa7942c35d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5b73dc3-f14a-43d2-88ff-1abc12389cb1.json and https://artists.proofprofile.net/proofs/artist/e5b73dc3-f14a-43d2-88ff-1abc12389cb1.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 0xd5406e5dd94a72b236a9169376fc6899391ee9bb93a2a2db9fc2e5ae9f318aa9. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:57:11Z), 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/INE302101048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bb55bb5d520e44b042b097c049b2c5320915c20cd2eccc8373e49e5c41cf09. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/INE302200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388e6ab6236f0b9dc2b6ed58ba085af1bbd368b980a70edab72697e344923a3e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:11:15Z), 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/INP612300817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe614745c2bfc0425fb90cae538544a63ab39c01f0fcb6813d893e8cf0d36ee55. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:54:51Z), 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/INP612300843.