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 0x6d00ad1fa08528ea70f41ba0ff4261eef6cd03b22273cc4c0179862245939f32. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8d235c1-e389-4693-8c10-7fc5b891f11a.json and https://artists.proofprofile.net/proofs/artist/f8d235c1-e389-4693-8c10-7fc5b891f11a.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 0x81edac2e74be7969a1f81c75d9bb618533ee2ff656f23bd8cfecbffea321fc84. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM24S2106028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f00aba86428f3ce173abeffcd2ab7711eaccbeaba6bb792a1854035d0b3067. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:56:52Z), 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/QM24S2202852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75251bd2455a7b347a5763fb204f35d0eca14f59541b558def314731b12a506. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTBF2327941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9434dc8e1e8c10318f364e8fc3c8a4e6c6f13d6d1fea8b558edf2ee64c659a61. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T11:00:10Z), 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/QZES52489504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cf871a4b0f25bb4d9e83c310d62a7daff8faa2b133cd7e19a88f4e95d1c25a. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:38:22Z), 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/QZNWV2423329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697b32c9ea7d90c0755465362b1799a2e4597cf7f3b8edd94945c5c90989532b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6Q2463233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d3aacb05a9ef29707168e79a25e9b5962487c73e64be32ca6b0dc65e4c115a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTGW2401160.