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 0xaf2aeeca543e839c64e2087276c0a6918f1207f9e8439ad442102c2e4188a150. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f192bf9a-619f-4479-abc7-0a0c1a328c9f.json and https://artists.proofprofile.net/proofs/artist/f192bf9a-619f-4479-abc7-0a0c1a328c9f.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 0x6d5ba8a88bdcd24b55b75c0b2896e73d6aed877d76e1740e45ede8cfc0dab71c. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:44:30Z), 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/NL3WB2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e007814608df12b0e725d28f03e3e98c8d349c5a6f3c2f03fbb96f2b20249b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NL3WB2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b425ecddee5e21ca94780dfac6c918c0edc5e1cb6c1f6b4fdcfe4a96ddcee3. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:21:04Z), 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/NL3WB2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf344c49bd7e5c8ef1ef679805954c29114ade2af0d296160cfb8f723c1d99b83. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/NL3WB2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf344c49bd7e5c8ef1ef679805954c29114ade2af0d296160cfb8f723c1d99b83. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NL3WB2500002.