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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcd0570f9722e4be88e7aa76b844917885f6de2684cf754f428e32f10b2b1f0. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c6049e3-a2dd-4834-88cd-9c76af9da757.json and https://artists.proofprofile.net/proofs/artist/5c6049e3-a2dd-4834-88cd-9c76af9da757.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bienvenue à Smartville (feat. Aldebert, Bénabar, Leopoldine HH., Alexis HK, Maya Kamaty, Leeroy, Mathias Malzieu, François Morel, Helena Noguerra, Dorothée Pousséo, Sanseverino & Tété)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507407ffd54d1905d2993abba484ea8a0249a886981ab4e39696785254879aa9. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/FR9W12438694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507407ffd54d1905d2993abba484ea8a0249a886981ab4e39696785254879aa9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR9W12438694.
Quand on s'ra grand (feat. Leopoldine HH.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a2417f7c59b884a1729e325530087de73afb6d268affaee5591e9b35e972e6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12431540.
La maison de Babagaïa (feat. Leopoldine HH., Helena Noguerra & Mathias Malzieu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a87b25e7593fcbdd9439615edd95f9a0bc8d1b9f89c3d98f93fcec24f275d8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR9W12438695.
Le roi de la débrouille (feat. Aldebert & Leopoldine HH.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d56683d005737f46c1bc27f7f852562191290d285818167ea531bb608fc6fa. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/FR9W12438696.
Voleuse (feat. Aldebert, Leopoldine HH. & Dorothée Pousséo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657b56ed70f41539743b8a3978e74bdd636a9a4557175168c99bed6a898bd0e1. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FR9W12438697.
A cent à l'heure (feat. Aldebert, Alexis HK & Leopoldine HH.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ade81bdb44e1e83c4c55ed8026426350105a069202da18eeb3e3bb640a727ee. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12438698.
Le plan (feat. Aldebert, Leopoldine HH., Maya Kamaty, Les p'tits Museau, Dorothée Pousséo & François Morel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddba6b4ba902c1b1667fd4e22c9d4426b0be654e08b9e83637f50398b9fd35ec. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12438700.
Plus fort que Napoléon (feat. Aldebert, Leopoldine HH., Les p'tits Museau & François Morel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8c478eb2023b46e7a7822c7afcd2ff9f0b29625c5555100c8ed226f8332e9a. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/FR9W12438701.
Quand on s'ra grand (feat. Leopoldine HH.) - reprise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8071358afb069ab45580c6f53df44b8f155b9b397e63d2b1288ae190071e643. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FR9W12438702.
Dans les rues de Smartville (feat. Aldebert, Bénabar, Leopoldine HH., Alexis HK, Maya Kamaty, Leeroy, Mathias Malzieu, Helena Noguerra, Sanseverino, Tété, François Morel & Dorothée Pousséo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21eac81b1e89bf463b6aeac616ac997d4e6065cf5a1ad2e9433201b7c974ccf. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FR9W12438705.
Smartville (Rose & le jardin - Version deluxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507407ffd54d1905d2993abba484ea8a0249a886981ab4e39696785254879aa9. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/FR9W12438694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d56683d005737f46c1bc27f7f852562191290d285818167ea531bb608fc6fa. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR9W12438696.