1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x165185107916ca1c8ecaa84b0fde144e75a44521eae4d902e11bf5f9e2471c48. 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/ceb73e07-545b-44e8-ad91-2e90859f058e.json and https://artists.proofprofile.net/proofs/artist/ceb73e07-545b-44e8-ad91-2e90859f058e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x43edfcc01eadb190e1e6def4a511444335330ba49c2595bcc97d08528910f0c5","isrc":"DGA062384751","name":"UN SOLEIL DANS LE VENTRE","registered_at":"2026-06-28T22:36:06Z","spotify_id":"3A42fpWFFWJXLoMuo99dbQ","type":"track"}
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43edfcc01eadb190e1e6def4a511444335330ba49c2595bcc97d08528910f0c5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3A42fpWFFWJXLoMuo99dbQ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3A42fpWFFWJXLoMuo99dbQ.
{"copyright_id":"0x7810ad136a25382dbb39de8c328ec014663cd1ceebaa09a8ec3903ebee844ab3","isrc":"FRUM72401715","name":"Tous les cris les SOS","registered_at":"2026-06-25T21:26:05Z","spotify_id":"1wVR7HIaFhe7RdZiokvc8N","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7810ad136a25382dbb39de8c328ec014663cd1ceebaa09a8ec3903ebee844ab3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1wVR7HIaFhe7RdZiokvc8N.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1wVR7HIaFhe7RdZiokvc8N.
Henri a 100 ans (l'album hommage à Henri Salvador)
{"copyright_id":"0xa1eae61b3e7cc120570e2e26cd58a0585bd7909f65442af2beeb0070ef3b56ee","isrc":"FR11Y2300100","name":"La bonne étoile - Live AccorArena 2023","registered_at":"2026-06-09T17:47:40Z","spotify_id":"7mCi3LeNBuPnxeiHSKPZ9Y","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1eae61b3e7cc120570e2e26cd58a0585bd7909f65442af2beeb0070ef3b56ee. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7mCi3LeNBuPnxeiHSKPZ9Y.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7mCi3LeNBuPnxeiHSKPZ9Y.
Homme (feat. Barbara Pravi, Camille, Clou, Emily Loizeau, La Chica, Laura Cahen, Nach, Poppy Fusée & L (Raphaële Lannadère))
{"copyright_id":"0x6f62f006f5c86e6e8d0a17dd1593ecaf785586e896888e97e03a57a6532bfded","isrc":"FR9W12434787","name":"Homme (feat. Barbara Pravi, Camille, Clou, Emily Loizeau, La Chica, Laura Cahen, Nach, Poppy Fusée & L (Raphaële Lannadère))","registered_at":"2026-06-05T08:35:30Z","spotify_id":"3QIZPNupFHSvcOPx0Q41XM","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f62f006f5c86e6e8d0a17dd1593ecaf785586e896888e97e03a57a6532bfded. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3QIZPNupFHSvcOPx0Q41XM.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3QIZPNupFHSvcOPx0Q41XM.
{"copyright_id":"0x7810ad136a25382dbb39de8c328ec014663cd1ceebaa09a8ec3903ebee844ab3","isrc":"FRUM72401715","name":"Tous les cris les SOS","registered_at":"2026-06-25T21:26:05Z","spotify_id":"4yc1g35qPrsRdv14COOXGl","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7810ad136a25382dbb39de8c328ec014663cd1ceebaa09a8ec3903ebee844ab3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4yc1g35qPrsRdv14COOXGl.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4yc1g35qPrsRdv14COOXGl.
{"copyright_id":"0xe267da9273f6ed3d162fa547a3aa2dd3c4d8d53f5b045c12fda7776e8596aa0c","isrc":"FRUM72401766","name":"Sauver l’amour","registered_at":"2026-06-18T01:35:13Z","spotify_id":"4i1dV9iYHOqotftrnJRy4u","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe267da9273f6ed3d162fa547a3aa2dd3c4d8d53f5b045c12fda7776e8596aa0c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4i1dV9iYHOqotftrnJRy4u.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4i1dV9iYHOqotftrnJRy4u.
{"copyright_id":"0xb4a518df8ef69f4722275efc52339c1f6b1a985beccb811595c509e3d75c2f15","isrc":"FR9W12239803","name":"Corps à Cœurs","registered_at":"2026-06-06T17:33:45Z","spotify_id":"4oCTzqoafxrvhNghwXFXf4","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a518df8ef69f4722275efc52339c1f6b1a985beccb811595c509e3d75c2f15. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4oCTzqoafxrvhNghwXFXf4.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4oCTzqoafxrvhNghwXFXf4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a518df8ef69f4722275efc52339c1f6b1a985beccb811595c509e3d75c2f15. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6OoJRg6gkKwKM79XiqodL8.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6OoJRg6gkKwKM79XiqodL8.
{"copyright_id":"0x7810ad136a25382dbb39de8c328ec014663cd1ceebaa09a8ec3903ebee844ab3","isrc":"FRUM72401715","name":"Tous les cris les SOS","registered_at":"2026-06-25T21:26:05Z","spotify_id":"3oWXRkd2txMGg3b1bAfdsy","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7810ad136a25382dbb39de8c328ec014663cd1ceebaa09a8ec3903ebee844ab3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3oWXRkd2txMGg3b1bAfdsy.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3oWXRkd2txMGg3b1bAfdsy.
{"copyright_id":"0xe267da9273f6ed3d162fa547a3aa2dd3c4d8d53f5b045c12fda7776e8596aa0c","isrc":"FRUM72401766","name":"Sauver l’amour","registered_at":"2026-06-18T01:35:13Z","spotify_id":"2Rxbuir279yMSx0KWgAcRX","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe267da9273f6ed3d162fa547a3aa2dd3c4d8d53f5b045c12fda7776e8596aa0c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2Rxbuir279yMSx0KWgAcRX.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2Rxbuir279yMSx0KWgAcRX.
{"copyright_id":"0x8ae2e1bdb5ec598b64ec855593d9bfb6e65f8396f702ab4b44e54877ee2555b2","isrc":"FRUM72401958","name":"Le chanteur « Collégiale »","registered_at":"2026-06-18T01:37:11Z","spotify_id":"1b8UU94fuMyS78hzDOJEl5","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae2e1bdb5ec598b64ec855593d9bfb6e65f8396f702ab4b44e54877ee2555b2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1b8UU94fuMyS78hzDOJEl5.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1b8UU94fuMyS78hzDOJEl5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442d5daa11cb2b3b7268be9a64706605c4976343cd1c04fa8488495f036840b5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3vifXudEUlh4LIKznZlFCa.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3vifXudEUlh4LIKznZlFCa.