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 0xb9fad2695caf3eb522dc00169de659fe07f9abd54253bfa1e2a23a88eee0188e. 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/6f4c980e-4958-4680-bbdb-22273feea9a3.json and https://artists.proofprofile.net/proofs/artist/6f4c980e-4958-4680-bbdb-22273feea9a3.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 0x107c3b942c2008c8488c65c2fe21ac8cac492a84f6c94fca0bb6a0e1bed60d59. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:39:49Z), 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/GBWUL2104465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5293affd0516c93bad1a76e9d5809a4980dbe6739a83fab1cb5fe83b2de8d84e. 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/GBWUL2110731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2050ce1f0a0ac8ff3f7a76b733b38ee84086596022292a7e72cd5e252ac468. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBWUL2110890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24767697dc25495b6c0f5dfc6b424b99dbe481d94507678c76d0fe2b7b763a5. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GBWUL2110898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd442da62c72904c1bbfd4d19029e7e40f36b6ace27df2c54ea1f7d2e0c55bfd1. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:50:09Z), 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/GBWUL2110902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5effc48b385c077a9b544ea403abb8d12025ff0786c1e92229301054c309d63. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:52:50Z), 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/GBWUL2110906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039969e1d408b13b8c3891a3ae4331f28a2e951bf0f0dce0fd7a332ad101d171. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBWUL2110911.