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 0xec1e5e00794b28003f6787612982198c5db4e0aa7eefa1a63af109cd2c7388ca. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb93e215-1481-48a6-9ec8-42c9a2370d71.json and https://artists.proofprofile.net/proofs/artist/fb93e215-1481-48a6-9ec8-42c9a2370d71.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 0x30ef8ea75c9d2f4aa777c36c055deaad65a93e53e2ffd7d1acb8a286e074b647. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:16:13Z), 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/QZWFN2402351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883a225509cd9f541af79f4dea200eedd2d5a5dd66aad72a4a708b053e2d3b6b. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:48Z), 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/QZWFN2402355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682641fede5d7b077580b2460228ad40c47827fef7e1e335174c9ef4a544864f. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:42:52Z), 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/QZWFN2402357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99f8e11257551dd547c26ee8aa4084c22d163e167771ddb39069260ff419ab3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFN2402359.