Simon Leoza is a Canadian composer from Quebec, whose music blends neoclassical, ambient, electronic and jazz influences.Josée Lapointe, "Le long vol de Simon Leoza". La Presse, May 7, 2021. He relea
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 0xbaf460edf30c66581b8b8f77db4e00e67047021e22220801a563ff4c3f2bd46a. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61b45b43-5c57-4a7d-8646-0129a3d06bb4.json and https://artists.proofprofile.net/proofs/artist/61b45b43-5c57-4a7d-8646-0129a3d06bb4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x14ddd4865fa3b70f27d00cb487573e57b73890d4559d4234ad9c3efe693ce592. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAJR72300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06874024c8b8f15871018a39b22fad37140e75ff6b9e095b5c68aee42468a165. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/CAJR72300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7912085304aa721ffb438ad142c62190db297ea583cf63b03874d45764193f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CAJR72300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81747a0b70d1834ece4ae5ad054b57de6f066b78a97737314e5e9581050b63a. 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/CAJR72300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed698849f6d593bcaa8d197bf2b818f03f1c0b7d5be60d43ad14f1a35ade41a5. 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/CAJR72300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32d91b0fc3fee84d2202dc5ef0b43880a14db473cb84281567506262f3ff3f0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CAJR72300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8764f112e075e3ed2b99b971352e27fa531aa63c0e2927c11eb4d8dba5263f3d. 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/CAJR72300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762a9de55ccaca5f32e7359bc1b22b285854f8e8e01e92b0f7a142f424929636. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CAJR72300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dba2b3f617918267ce770a4c9b9c400365735cbb5905d36b691029faecede9b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CAJR72300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523a66dd210aae281e430fa90e82e9fd5ae8e94b650b475acfff7b970174ca9e. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/CAJR72300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f9e2375ba242e5c2b28ddbacc457195f6f4f4880cf0dd8c8ee2a3c0f364041. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CAJR72300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d17a6ecabe9d6bcf055fa5efd043ae11727b391c7787df7644f86c8a3c7fda4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAJR72300033.
L'enfer d'un monde (Bande sonore originale de la création de ZemmourBallet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5714e246648d5f49eb19eb220a148edbf5cbbbc67c8eba6f33f9350522991e1f. 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/CAJR72300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d49ca678366733a5c68f5e69a1cd1fb44751524adc000bd0f905c6440edb833. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CAJR72300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c865fe0b0d3a90b7f7222064275644607a7d5deb7eb3b648681a4b647dbdba8. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CAJR72300007.
Albatross (Live à La Maison Symphonique de Montréal)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b72eb64f45fe933ef72f24fcea630521564bd2a32f1b18a42c056fda334c79. 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/CAR722175004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6991c78383923cabe2d11cd394bcc71de45227df6c34df089eab218392f5976a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAJR72100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63efd7ae5cd4e1bd1fdce28aa4e44fb8749fa697f1aed2a12a5dd6f71963031. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CAJR72100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73817aa6beef3f609ef14de6d824a43085304e763dcc0764a932b01a350c65e1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAJR72100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa432e2827e67902d70edb923e66f3e41fab873a8e9e3033c16be45dee1f0e75f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAJR72100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b867ad128d8f8119cb1131b9817782b8f6d27476288e20c7578e75b53dc3d2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAJR72100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a81d13394a3966fe39c18808c43b246f15b2f6058b8e33f637923c75f352d9. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/CAJR72100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4299ed4d3fc9b9d68efd72180ec854b1a41637628c4f7b99dc04cb60e9b232. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CAJR72100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79f95561bc7c1499516c48d2d71cdc6f8a8e2486470c24106aa4b8a9eca3884. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/CAJR72100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff298d6a761ddd6d89d9a7ee24c021cb2914a67d4d33d51944875dfcaf9a7e2d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CAJR72100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2fdf6e6ef16cccec31c3a1278e640ee4cd4b4c1fad8e84a5efedbcb1f48e34. 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/CAJR72100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7912085304aa721ffb438ad142c62190db297ea583cf63b03874d45764193f. 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/CAJR72300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7912085304aa721ffb438ad142c62190db297ea583cf63b03874d45764193f. 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/CAJR72300024.
The Escape (From the Short Film 'Invincible')
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5853d9d551c9ed725b7e405fb20c52c3dc47be7a54188f23f09975f37a57faa6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USX9P2330834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762a9de55ccaca5f32e7359bc1b22b285854f8e8e01e92b0f7a142f424929636. 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/CAJR72300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe92664141784bea7df6a7de6b0eb3a806fe41f01c7592440e5832030aace113. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAR722275017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa432e2827e67902d70edb923e66f3e41fab873a8e9e3033c16be45dee1f0e75f. 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/CAJR72100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73817aa6beef3f609ef14de6d824a43085304e763dcc0764a932b01a350c65e1. 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/CAJR72100003.