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 0x295e7cdc64c8c56ccdf75c8444bc06cdeaf3f0c2465c8e42794e705a54b7bbda. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3944ecbc-9fd8-449f-9e04-928dea5d4fe9.json and https://artists.proofprofile.net/proofs/artist/3944ecbc-9fd8-449f-9e04-928dea5d4fe9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Swing la bacaisse dans l'fond d'la boîte à bois
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 0x1f97b8d2a4a2e475d0c4a1e46b499e41da2be015813d9f5e7c7cc6bb1e661de4. 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/CA86Y1240409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f0d0f82a44205903aeb88e2eb867057428bd1bad46d2cf80d05c95e3bd5704. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:50Z), 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/CA86Y1240420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324ed1634933cb5bb402fd4674208d27af467c338ecac7e663f8bbe376e55845. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA86Y1361302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90aa9a199d0cc988dde54cfc6941ad65c8ee7a7c3fe0e24b19530b67eac80644. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:01:51Z), 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/CA86Y1361306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9db127b4c9b8b220f2fbc3902bd06f84b2390e8851f5bf4c071db39de10104. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:48:21Z), 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/CA86Y1361309.