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 0xccf4a07bc778427be5e40d064b36a54675603f506f8bfc2ee993cfdf4299e59d. 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/7c7109ca-8580-4f03-94bd-bc43bd41f880.json and https://artists.proofprofile.net/proofs/artist/7c7109ca-8580-4f03-94bd-bc43bd41f880.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 0x624508bb58885661f816955674244eefc2c16307b6ffe2f207c69fcc9e3cc26d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:07:53Z), 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/QZCKC2300297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61048d52281de8fe59301d843cb9d689f4ee2107db848952507f1a9b5d673dc5. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:23:32Z), 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/QZCKC2300298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b81d2af98687186bea32b2364066e7d1e9997433491816c3342f9772d396f3c. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZCKC2300294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d7ee24e4401d2a8d37c447672c9531337b2faf3a6fc8bccb7abb0646b92a12. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:12:06Z), 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/QZCKC2300299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710556541bd9d37a6b74b2e947c78cc11253b0e0878e6bcb3602794d50041e20. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZCKC2400270.