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 0xe501f2425a2066433be4135876425c8dac1d1911a98e4291b76b5e38a1894596. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b08c22f-25f6-46c5-ab80-16a3458923ef.json and https://artists.proofprofile.net/proofs/artist/1b08c22f-25f6-46c5-ab80-16a3458923ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Face à face (extrait du spectacle « Les 3 Mousquetaires »)
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 0xc60693e1223fbea29c618ae6dc21668f74445891c6c4b416c50446c5cc3f4b1e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRZ051600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f46e2c79603d006a5d25b0de732765e8919e31ca67cc8f27a247d6c2d1d702. 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/FRPZ92103300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d39b77ed06613df6b939e6412d7b37723442602c200d87236e6f276b25e105e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:51:12Z), 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/FR9W12342698.
Chante la vie chante (Love Michel Fugain)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d20a6df44579940486cb8012f178bb7d1c13eae8db342e409806a47c362ae34. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRZ051700164.
Attention mesdames et messieurs - Love Michel Fugain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720e4c2737366fafc0d786b39d72e320108e07783076767931dda0d88f598c1a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRZ051700187.