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 0x37be78c35c546820f26ca9c68e2cff6a4a73607faed5660edda1b466ad2720b1. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb946e12-07b3-4c41-b489-a86253f0afa7.json and https://artists.proofprofile.net/proofs/artist/cb946e12-07b3-4c41-b489-a86253f0afa7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ICI TOUT COMMENCE, Vol. 2 (Bande originale de la série)
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 0xdf0db47a07cd98e5a3ba966ab57f71e59c06c5d411f1f94b2a57e1dd02ade5fe. 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/FR1F92401640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2a6ebdd48282f5e8624e8cc5797aa1b9bd8bee2b4837cddf6be5fd6f0ba926. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:05:28Z), 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/FR1F92401680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f9e1e8475b0137c55fb1b1dd1ae876348c8156d0f54cd47c4e8c1c00615c5c. 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/FR1F92401890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa060d3b21dda2cfbb8b65dff06e17ccee2550c781e3bf4c437b9ccec1256c0. 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/FR1F92401920.