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 0xd85a466b1c462367b64ede690b4689a3f39ed4f249a791c2135fa34b4b3d75a1. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad4c8f3f-2e34-4988-a932-6973ac5e4836.json and https://artists.proofprofile.net/proofs/artist/ad4c8f3f-2e34-4988-a932-6973ac5e4836.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 0x7655cdbb6141874d0d4f7930b58e586b2c40541c888d8735b715835e05ef664e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:54:37Z), 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/US7VG2448682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04753b6048243a6c9b2696383658652515cbf87ad79f0d8b8a4a3f6aa19a5e72. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US7VG2448683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e5c1948631e2d06b013580c8a56492c2f059a7ed0242d7d8aaa9bb4a6d55df. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:33:20Z), 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/US7VG2448687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921b941518717512c4d3fd6cff7301f51065d7e27c93af3cc175d4042794f681. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:05:00Z), 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/US7VG2448697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547c904baf556bd95e60340161fa03c05cef2e37b765ea86dde320c5662c6b42. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/US7VG2433004.