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 0x528ebbc20c83d257996f41ef7d3d1ade92579e3a83646f3c190dddab23f1f0ea. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d709080-3c31-46c5-871b-ececfc2eb11b.json and https://artists.proofprofile.net/proofs/artist/3d709080-3c31-46c5-871b-ececfc2eb11b.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 0x377aa8169b67dd0bd0ac03edd1874121551c8f34bf9fc83c9bfa3f6806416c50. 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/QM6MZ2569383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25a6d646d38bd53795af48c9905b7bbe34aac81830c9e7e7d4f12b461e8a190. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QM6MZ2569385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08590373f6f3d5ad29f6f523cdf276f44c6b4ece5b0cf7a25d9c6a46e4b12d5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:35Z), 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/QM6MZ2569382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377aa8169b67dd0bd0ac03edd1874121551c8f34bf9fc83c9bfa3f6806416c50. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:02:00Z), 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/QM6MZ2569383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002b32682abf1c019d470a1bc99f54a12fd02703284b25422ab3db4fd82efb7a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6MZ2569384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25a6d646d38bd53795af48c9905b7bbe34aac81830c9e7e7d4f12b461e8a190. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QM6MZ2569385.