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 0x7d87c2dc0170d546b5a9c74259b87bab2baafffcf69163f5f4bbbdb4bbb02b7d. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cac9d57-89d3-4e00-b288-f1bfd58676bc.json and https://artists.proofprofile.net/proofs/artist/7cac9d57-89d3-4e00-b288-f1bfd58676bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les p'tits curieux de Maternelle (43 chansons)
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 0x1e4e52ec91b8c28c693d74d23912b1bc8ce4ff134291d30943d379475f8bae31. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:56:42Z), 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/FR2Z21300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd1f8c5bb800aaef8c39da81e5aaca3d1201ac737e2858dfffd58edcb248b3d. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FR2Z21300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ab6cdb36f5526b3ef856e6c40a4e659247987be747a49f04ca34e890491ac0. 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/FR2Z21300039.
Les p'tits écolos, vol. 4 (Alimentation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec314f1fd19923c0195432f015d751b0736be5893e3c3e90388857478154a70. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR2Z21600013.