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 0xaf47a1f7faac7ee47b137044b08e782ac8248e4fc90406374f82244b48ffd881. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5fb873f-f210-45fd-a787-f1d65466b632.json and https://artists.proofprofile.net/proofs/artist/b5fb873f-f210-45fd-a787-f1d65466b632.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
COVID-19 Six Feet of Alone (Instrumental)
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 0xad606e4f58b6bc7eaefb645e2dd6b2fec970b7173ff044694b97e0cf8a9beb4b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:32:36Z), 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/QZMHK2053083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5082cc25170f449416723652b59e4b42cd0b58360b526b99341b9cbd7ea8bdf5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMHP2450193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bc6ccc079980e30fb4d6854132443f480a00d79605d9537f8e8a121cd1d3a0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:19:56Z), 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/QZMHP2563391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c4a3a4b76117e48c60c1699310a8adac7d25acf85d985b6822a37527a2fbc4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:17:50Z), 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/QZS652556128.