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 0x6b264ec67f0cdd2e5dfe047d52874ba0751559b67544d2ca5a64538af7441f70. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c9a4f9b-d515-4241-ac73-d14e02a038b6.json and https://artists.proofprofile.net/proofs/artist/9c9a4f9b-d515-4241-ac73-d14e02a038b6.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 0x690aa4e266e4e533c9f4aafd1698ac32dcfaa947413bbac0411ed5f3a070188e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SEPQA1400884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001668d2a44b757f632ee1e2da414ab4a04a6e3e4f499ceb33bc32a419125b1f. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:47:24Z), 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/SEPQA1400862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5603d396d4ed7de373841678912f89e79ca0960aea6cf7d5d52f939707294264. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/SEAMA7131180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eacd63c362c2d9919246f90ce2e11fa20cb61847203e4cbe41c3a4c91dfa244. 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/SEAMA1200534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc6fe630f13e524e74a43e06eb7582fb611685e73f44042b4297d999019dde6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:04:59Z), 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/SEPQA1400872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da7dd6a66f173191bf51dd693780ff2815e2f58d7316992020822b79e1b52bf. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:28:39Z), 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/SEPQA1400873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0faa838a8acb8483d04b6cba2b718950862bc4ae8f0f9efac35dd9a982e50ca. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/SEPQA1400879.