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 0x33c71aa7545b9671fb1019930edc7520293eb5ad6b36bf95f3292240b5b29437. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa814269-5ece-4cdb-b3c0-c7e54ff8cf86.json and https://artists.proofprofile.net/proofs/artist/aa814269-5ece-4cdb-b3c0-c7e54ff8cf86.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 0x337eac7dccbe1b41cf1cd262b62086bfcdf8ab465378f971e69d3f0ecca26fd2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:58:54Z), 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/QZWFU2429329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be6fc874e966c187592977b4c7df14a047f87068ee08dd3a2d40b92852589aa. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:08:10Z), 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/QZWFU2429330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb7145eca13f25c7f3006710e654a1b486296c4ff12e337eaf532ec43b3ffa2. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:15:59Z), 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/QT3EZ2417827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70457a2b431bf6b0fe68bed600f7733b2a7709d9dcf5500fc9e36f3d74e8c047. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:35Z), 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/QZNWY2584797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ced3badb601f8e72bc8b9973e49290550976e1a7c9413d8a79a8ed68864143. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWY2584798.