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 0x51ee573e08f7a3d3c0e4aad243de5a6e83b4a44ee765d913afc9279f0ea65cc3. 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/ebfb12d5-e646-40a7-969d-792275a8a3b1.json and https://artists.proofprofile.net/proofs/artist/ebfb12d5-e646-40a7-969d-792275a8a3b1.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 0x4cff930b0678dd11c75aab661089baa95e1c5bd2b2ba738e0343567b259850f7. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:31:51Z), 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/QZZEC2317740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8a77bad8e6df9a1f811d55265f789d1536c1ac1796e9e2be9eaaca88d534dd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:20:28Z), 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/TLVEM2420231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78adf42d0b432c5e300765da067297bfd9d639205b70c0678e53a348f3731ab9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TLVEM2420232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccfca01140237b4e7c4015ffb431a39e2697285e6ee78ff8ef97c50c48b4989. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TLVEM2420233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f976e4e634de492d8690345bb72c9dfe133e811d5835ee6ddc664a93cb9a00. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TLVEM2420236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa395855ec38b7ee56dd52e8a12d2d39b1f97362ae145e7b154e6aec1c06fbb6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6N2208358.