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 0x2786c1dca2993a9334fef9f0f8d78b08c6eb7412f74daae7c31de76f5d024097. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcc3dc8a-d0d2-42a4-97c0-0e4b1890ba49.json and https://artists.proofprofile.net/proofs/artist/fcc3dc8a-d0d2-42a4-97c0-0e4b1890ba49.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 0x567ab89e9cd6a44c169eec6e847eb6c3d1c14573abfbb05500305e6d8349ecc5. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:07:04Z), 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/USCGH2102473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc335f4a18c44cd4b815f50c1f9f6e9362edc6efa63c6d08d0812c664e9033c96. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:45:59Z), 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/USL4Q2004982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd9aa66c3e91193e6a6c4935d1f696e4664169965ba4359166aba8e2b5d64ea. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:21:43Z), 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/USX9P2474585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2054fc7ea27ab8ea442d5169a2f1dc7c8c83e906f5d76aef9b1c34d3e3b23b9b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM22578100.