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 0x7cc2759b5ab1af8ddfe82b90a3d57f3fc44e3cf8e57a60373bd6ceddf65f7449. 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/c9f73480-9790-4687-9606-9c6e50fa3379.json and https://artists.proofprofile.net/proofs/artist/c9f73480-9790-4687-9606-9c6e50fa3379.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 0xcfa310413a20046e6ae00f9c7b0833a97bb455c02deeea0656c6713229644ecf. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:04:47Z), 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/CH6542078877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af92952abfa11c8aa8543ff2f069003ff7f1469d71fae4d1d6c51939ea2bc99. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:57:34Z), 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/CH6542097787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f302a6311c93463fe6774a106d6c9fc106353d1d9d44784207e9664f425e16. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:43:40Z), 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/FR9W12146877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4bd42375d9829c31e5998c60313b9b36d9a18d56b5b50f5e629dceb1ed022f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX202384556.