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 0xa839c27825a0d5d71d7444b7a58e0feeb553fa8baed0a55c3ee4bc4aba840d3d. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79b74ca1-5037-4cbd-b59f-1f6da0637fa2.json and https://artists.proofprofile.net/proofs/artist/79b74ca1-5037-4cbd-b59f-1f6da0637fa2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chabrier: L'étoile, Act II: Quatuor des baisers. "Quand on veut ranimer sa belle" (Lazuli, Aloès, Tapioca, Laoula)
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 0x421c81f4480d631f55d51d97044b86e5d0d76f1e99ecbb98eef13e5bf014a4f9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRZ118400304.
Chabrier: L'étoile, Act I: Trio de chatouillement. "Il faut le chatouiller" (Aloès, Laoula)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f3ae1d86f69610baa063989228a1e24e36c0564b8ed67342f7d44d9d50df68. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRZ118400289.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Chabrier: L'étoile, Act I: Récitatif. "Ciel, qu'ai-je vu ?" (Lazuli, Laoula, Aloès)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6fb55ceafb2dbcb76333258cbd5bfdd91e90e5b7f83276af02d3ee0e484828. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/FRZ118400292.
Chabrier: L'étoile, Act I: Finale. "Jeune homme ! tu viens de gifler le Roi !" (Ouf, Tapioca, Laoula, Aloès, Lazuli, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9972c2fa68e71a004638a4dfaa0ebfed58ab8ce79b5e9a6703b74f3c7b716e7. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRZ118400296.
Chabrier: L'étoile, Act I: Dialogue. "Arrêtez ! Arrêtez !" - Récitatif. "Holà ! Qu'on m'apporte" - Choeur. "Donnez-vous la" (Siroco, Ouf, Lazuli, Laoula, Aloès, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a6afdbc96a6fd0d527c569a0dc222926c4e8d4088caece7d76e82c54a2ba95. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRZ118400298.
Chabrier: L'étoile, Act II: Couplets. "Tous deux assis dans le bateau" (Laoula, Tous, Ouf, Siroco)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce89f2978ea42b70718723e798ad7a0068502a778a0a5672b884a5a5191062b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRZ118400312.