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 0x8a1e51e81ab58ce2f5589aa0f9e8b5662514435f21d0366264b18a18338c5aba. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe3bc96c-dddf-4180-85f0-819b1c07f29a.json and https://artists.proofprofile.net/proofs/artist/fe3bc96c-dddf-4180-85f0-819b1c07f29a.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 0x18d3e76b9f2deb9ec353699678a09dce71d264158f701585b229beeee1e20196. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TRART1700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869e1efe6441bea17c57b54415759fa7b7c40edc45f7e96e399be0e634359f24. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:39:09Z), 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/TRART1700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c43367db1ad64b6e9494d908888df987c148cec892824a79f66941a6d2aa64b. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:02:08Z), 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/QMBZ91978380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2db522604695b4f29ca15b11d8ddcb51e933ad946fe202b3b7061675551ffc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:50Z), 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/QM4TW2206824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bec29143df3aa5477a8aa89491de7dead8af5829d9fe9fd5d84f9cad9a09822. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:25:45Z), 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/QM4TX2414803.