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 0x8aaa43f7a9e16e9973873df603415d48fece753b831504b22ec3a2e05c4a9b56. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70b3867a-11bf-49de-bd2c-8da518a9b9b9.json and https://artists.proofprofile.net/proofs/artist/70b3867a-11bf-49de-bd2c-8da518a9b9b9.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 0x7f52a0be12d11eb50faf2f15ab7ce5b618bc9a3791fca76974aa00af41ec0b10. 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/SE6N62203309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33df8ea05ac82fe158b570028a8c871674aa4c6893713cfa079b9d463b221a5d. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/SE6N62203308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f3268643627ab3040d5b22b475ebc8f0c7268aae522958f19950f2e44a4579. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6N62203310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf4f0522fbc97c9b381e1b287b1b518cb2e0c1ba08ad01a28f611ddfcb63bb2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:38:01Z), 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/SE6N62203597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776c2e7b2615856f7bb8578b19c6f75035c289d38dc779ea6063ad6f89c106f9. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:22:50Z), 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/SE6N62203834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2cc8f390db07cc9ea374ff37a67e071f4a150ae3f4cca2e850929786ce17df. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:30:17Z), 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/SE6N62205042.