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 0xed3240565511aa2732c8ec09225995300abb0859a58f521293cf17dee34a3fbd. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e73efdde-bfa3-4a74-a40a-66524c0b4eca.json and https://artists.proofprofile.net/proofs/artist/e73efdde-bfa3-4a74-a40a-66524c0b4eca.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 0xda4cc6e6ac4af4afb16237a7e1ea2f9fd14534c62c2acd855c4c32e3a0a8d1c8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:39:04Z), 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/BGA472334981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977a9fa294af7e0d9487a3697a8e1e1871490a92f4a09d0ac2fc4d7a32423e48. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/BGA472336687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00033b77c9eee70616f541c7f89c4ef195484f3b18f4c9082e53d2debda1e20d. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/BGA472335152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbbddc3a8c35b4f8ff0c48393c843ad7763677d615dcfde8ee443b4b7ccbb1a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:20:04Z), 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/BGA472336964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4414348f2853e48976db875d859aaca0c304479e2f8febbbd3c9c8e167097cc2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BGA472335193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4125e90286aae0cb04fab72297c7aae892c9bf331fc2fb76e3c3a58bc51f40. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BGA472337052.