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 0x2f8c143f81cec3858a88185b13c8d7bc221f8a48d813cdd945f8c4622785c392. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23914cc3-15d5-4456-a5ff-f855c9834529.json and https://artists.proofprofile.net/proofs/artist/23914cc3-15d5-4456-a5ff-f855c9834529.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 0x5fef04d9f1fea580ac7aa34c0d01322b9fbc1376eb06bd2819dbb1d2b223a287. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:03:12Z), 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/MXUM71901939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb1d4f6f7be306673f0504f3ad1e46c37f9ab2ac48f8b4e37754681d7cbe4dd. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/MXUM71902232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb788d36f0b0e7d02f63aece0c80ba87bea7a657770729ed1e5c60f4a5845ca1. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:00:45Z), 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/MXUM71902233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98121c3717398a7075f8f4bb9ebe8c236a07fb0089e3e35c4b113e9eb0b32d2b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:28Z), 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/MXUM71902235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf926422613b7c333d1080928fcb3a1d02da143f4102dd316ce331402723bdd31. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/MXUM71902236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d76ae39b205ece1bcb43337aae2324e86915718d221e718b0644e8e193a87a8. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:27:17Z), 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/MXUM71902237.