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 0xf22af1799cc52569a6a218dbb6063969a56ecb681ff2a6862f6bc0216c1bc325. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/880df302-7b7b-4208-9af2-8c82937045d6.json and https://artists.proofprofile.net/proofs/artist/880df302-7b7b-4208-9af2-8c82937045d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le siège de Corinthe: Que vais-je devenir ?
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 0x200641fea84b3d6fc331c102e310d587dc7b61c389f48feb7a128713fb75762b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLE422103401.
Le siège de Corinthe: Du séjour de la lumière
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ad2073c5f3f4d5e455e0b89c7bf166abfa53b082df601142ffb6eed52d15b9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLE422103402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cfedc633984adb06f245d476f826f2fe7dc8a751fe615ad225327416657b6f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLE422103406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9d1dfa68b418bc025bd9a36314e840bd7130a243603df8129522accdf294f8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLE422103409.
Lucie de Lammermoor: Que n'avons-nous des ailes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c94fa2c3bf2c57ce051077eb8098b3b5f8fa69736a79db8aa839b89bcb0c45. 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/NLE422103412.
La Fille du Régiment: Salut à la France !
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5c742704ddbcf1b5cde7e1bbd756d32a556a1fd3620c4da8bc6b5981fc0ba9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLE422103415.
Le siège de Corinthe: L'heure fatale approche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02efa94fcd571676bb7bd141bd2a97c42b083e49615216032af9eda3e1b49969. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLE422103403.
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 0x25f239510cfb68b070efb9ca71af1ff6174ab8aaadeca934d7f2f2d81db171b4. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NLE422103404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eff16eefbd1da839076f3ac7cc21c884b5dbc0edda9b6cd133550b6f6f2884e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLE422103405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89cbdc4672cf662c65e5b667101750fa494e85dd1edc4ab777b55c2059b9ad0. 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/NLE422103407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f556145a46d913d1c84a8598932f5aab7ec4a78830a5bed64264f3a973aea9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLE422103408.
Les martyrs: Qu'ici ta main glacée bénisse ton enfant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4dc6a1aa79896b5cba7a54b67c0437773f76de9027836342d5b9c1f06ef26f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLE422103410.
Lucie de Lammermoor: Gilbert. Ô fontaine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f7a6334af6e2a1de484ae3bbf3d4f89e761b4d50365066d758a8e39a4e29e9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLE422103411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784379d43d83bd7e391e7bd46e9ae9b7dc016df8bbf757f310d5ff6d1344e8f3. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/NLE422103413.
La Fille du Régiment: C'en est donc fait
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1077bb8f58299364dc703338e42b7f6fc390ab097a219222f89375425b1d4a. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NLE422103414.