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 0x18a3fd68e6c486d2b8daad4cc0f5b9411e133cca7f0c166f705b02252b64ce90. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe705c8a-9fe2-4f21-940d-5d43d5832148.json and https://artists.proofprofile.net/proofs/artist/fe705c8a-9fe2-4f21-940d-5d43d5832148.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cd7465fb2bba379755c4e74cce969f4eb07d76e32b3ddc53e7e957a8c3f910. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLA200200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f58edcbf9209995c3e6cc8efc97470ade391cb49ec7f7cceb5c1ffd88e0c222. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLA200400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1291bd49c8ad70e18167c3ade6f70bb3204fc55d73e5c6a10383cf28624117d9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/NLA200400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f154d77445009a03b473fad45819f3a9102540a43403eaef6de4f030946232. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLA200400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e4de9040bb58b9380f9730656dd4f4cb02f8db7eff8cbbc8de8a2916ea6bdb. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/NLA200400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8b83611aa66f5c5eca6fe6a6ffab1201b08bf0d80801d5e299520a711a6612. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLA200400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebce78ea81a11b9f17177ea43e83cd32b641f61680d934d5726b96a25e732d5b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLA200400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39380f09cb324eaf1b5418ab033346d84fad7557017ec30e9a81681ccd8ed752. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/NLA200400117.
Wings of Gold - Nabucco: Va Pensiero Sul'Ali Dorante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9456761efe7978bf5dff310d3e8dafb334766909e2bb46342f9bef7c15889ad. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLA200100154.
Standing By - Free interpretation of several themes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367f8d7713dd85094c7897863306c8ad0e995ebdc873ab06d18bc0f7baaa0cf6. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/NLA209700055.
I Walk on By - Il Trovatore: Ah, Si Ben Mio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1702b1862a9d3db74f1b72d0302d2fa207c02fd5208e7d1d663622b40b564d49. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLA209700057.
Is This Called Love - Rigoletto: E'ill Sol Del'Anima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3347c83126732941cdc783c121b9f522978c806cf34946fcc580df371831c0d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/NLA209700061.
Guess I Never Will - Il trovatore: Il Balen Del Suo Sorriso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ce184b59183776ab893109f5de1dd437efab53de30c926124494ff401e6fa1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLA209700058.
Almost a Memory - La Traviata: Libiamo Né Lieto Calici
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf25299d8edf363a72acef4305e1b5df1f9ecfa8f91bead20e3f02be32064c53. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLA200100165.
Sunshine - Ernani: Ernani! Ernani, Involami
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3f4a92721ccfdaf6b63417913b9bfcc7189ed2d6d8a6ba6ba17ec96841cf48. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/NLA209700053.
Like a Star - Rigoletto: Parmi! Veder La Lagrime
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc503432aed7bc7fdad5da80b6523dfae053f02e8d1e87ed61c73241ffd65306e. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/NLA209700143.
Anthem for the World - Aida: Gloria All'Egitto "Triumphmarch"/Vieni, O Guerriero Vindice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675882ad8bc46ec50c2c3c44bd70ecb3182c7026ba8cfdb1f5d7ae291c7e0a37. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:10:37Z), 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/NLA209600089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a8a689a06063c986a1065d6b444e53e4709b7c690fd2ea33e9d0d1d09789b1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:11:07Z), 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/NL2093000231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ffb1bcd6b3b2556848bd594261716a59d4d6338e1bd8a4a5c7e5fb3b395efe. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:43:41Z), 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/NL2094000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f68f3f66ee47398ae6db9b7ea667ac029dbed8c44840fd16231f41529ffc78b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:02:30Z), 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/NL2093000227.
The Classic Christmas Collection - Hun Mooiste Kerstsongs
Two4U: The Young Messiah/The Young Schubert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb30aa9fe56b10a2b20289b6ad3e2baf9ab2c4d8174ae76c0d2569d552d6de3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLA200400215.