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 0x4a79d3c8c0d51bf62704388d079f462fadcb6b02d9717ca2e5309e5fc762d0a2. 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/5489320c-f55b-4596-982c-ccfdb40a3290.json and https://artists.proofprofile.net/proofs/artist/5489320c-f55b-4596-982c-ccfdb40a3290.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 0xa954587ef8cb53380755acd337e66181653d8aa35a11b8db11917629d66ba9aa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:34:56Z), 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/USDY41807678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8694e4448d22b19a570d24fe2209266055fbdcbd340f4cf1f9f1a5ac626ecfb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBMLT1501539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8694e4448d22b19a570d24fe2209266055fbdcbd340f4cf1f9f1a5ac626ecfb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:50:38Z), 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/GBMLT1501539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa389c994e0b782794d9782e848b97b592c01ae5947d44dd93352213e9015fb58. 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/CADE72400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140bd4b188625a4663a17cf79b990efc11228e78ddda3bb7aeda224bb8ed0caa. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CADE72400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2477c1a83465e89f414966004d028f5aced30a275abe42527d1c178166d466. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:34:32Z), 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/CADE72400049.