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 0x68941518add88f99199525573ec98410b18ae557df40c7255e918e66c7a8245c. 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/f0e825a2-efd1-4eb2-b4ec-4e45a4ab846f.json and https://artists.proofprofile.net/proofs/artist/f0e825a2-efd1-4eb2-b4ec-4e45a4ab846f.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 0x7c8566fd3120e23eca1939d3bfe364154161ac696d812839190fd0fddc5efb8a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:51:10Z), 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/QZZ7V2563396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec25c42a8f9bd2bb780ec8f51d584f3fc061b3680deafcb0a8bf11347076d55. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7V2563397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202f24026f63aad356bbcd16832e3b7efb57672842bdcd03b8e4189de4c7cdad. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7V2563398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8731511ad1ff592d2bc9786951ca6ab2ca24cde618ec013dd9876028d9d3a876. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7V2563399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6792319fd98f019bda2070ccb83dbb98c10eae0e6a0874aac7ec1f3fc488e3c6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT6EB2517301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54afe4ab4f87061117c1b798141b913f30f0c1d61b9d9530b33e3ceef4bf0e63. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:56:00Z), 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/QT6EB2517303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98abbbf07ec83f9b3fce98e6670458b1313bfd8bb8d49fe2d7529d37e355d801. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:06:05Z), 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/QT6EB2517304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09554657e96650ce4875b17499e62b69b03ff0dba77162f2225bbfd9f1b12c64. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QT6EB2517305.