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 0x8c117083a0ab7a0651e42697db2487a5ee54a5e4e500de843dab5e4ccaf90181. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/748540eb-9603-4972-810e-d51e324ae28d.json and https://artists.proofprofile.net/proofs/artist/748540eb-9603-4972-810e-d51e324ae28d.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 0x2e093fe9d06617e2dc9138a28913c31db129466472c71aa57b0be686504265b0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:22:41Z), 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/UYL842400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406a328e48d5c6b7f09806b24f4cafcf32a02355d7d38bf13c7140b3995242c1. 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/UYL842400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf373d6327e39e47db394d8f7f703b7eee6651ced0f6f5f3df0f4a20edc5000a3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:12:01Z), 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/UYL842400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85975763f5d785ddba75ae104d90a89528321a08cd45d9d11259de89802adfb1. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:41:56Z), 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/UYL842500023.