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 0x16310fe7397b6260d358a0653d9440e8e396d6bdf5333869afea1089635b59c3. 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/87050a39-20e2-4d19-b798-2ab6f9c70656.json and https://artists.proofprofile.net/proofs/artist/87050a39-20e2-4d19-b798-2ab6f9c70656.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 0x2656dadc67b9777664319020286a4c3055b5d6a3ef75845b9b23d6faecb51a48. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFME2360936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773133eb43a1ab0457b57c3197deabfc3b14b304f3089db1aeefe27a9826311a. 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/QMFME2360945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ab921a9355f0622f323424dba8f1dc43678547cff72328864a5d3777e393c0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QMFME2360886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827ad5c16b2fdea632dbdc31c9631c564a4139fe8c519e471a0b1244a061ad82. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:43:27Z), 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/QMFME2360908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24966bb02d6a8c1ac02bbe7a644b28816836bb34aa9127cfde6b78c318dc0b74. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:40Z), 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/QMFME2365345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4eef7c46de86c78ebc75f40e83e1664340c77fb6b32b4ef75996fee1b935c24. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMFME2365354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2806474da6ba78a5f5836ed441d67189d29828893f5370bd77f47cbc6701521a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:01:13Z), 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/QMFME2365357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebae81ec12a7d151d49a3695caef9af1b595cc9a060285823ad253956e3000f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QMFME2365358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf61dc01efc5f18bb96cdff04533c181759bf065aa5b7481ff3c4330ed325ee. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:27:20Z), 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/QMFMF2344370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51105e90ce004dcdcb1e88c4e61df1d81465033d29227a5c4a24ef6e136ef2cc. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:50:00Z), 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/QMDA62545834.