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 0x632b265f13ffff5b66eaf8e834942d5ff5103da52f5cc1a688672054a5a9946d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74acdc21-59af-4a4c-b940-8eeaf3d8a057.json and https://artists.proofprofile.net/proofs/artist/74acdc21-59af-4a4c-b940-8eeaf3d8a057.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 0xc89f9b5f03dc2b399ada5f686a9de0dd8cf2996dd7a4f582aaa7033b84d4d7de. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6L2549694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506709c071d1ad908534756fec19937ae49b68f3ea27e7e1f06b9883f6fabbc9. 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/QZK6L2551932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab7ad8d595adbe6447dd84cc4e7520d8164f1f23a968dbf5ff17db15e9b523b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZWFL2582326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6190433ef05007045f1d15e43ef3332dee09575d64c2128febab2bfd9d2952f9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:54:12Z), 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/QZWFL2582327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fc90d38e4fc004ff1cd95c4ac4943778453f68a1f15ab1cacc46aedbc7674d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:56:50Z), 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/QZWFL2582329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb7b924632f5d55121341d66ac08a9ce0c40d181d1528512fc8d2939eed2053. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFL2582330.