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 0x6c60c1229f86e7ead64ab5ce0503164a27ba61da29bfb359354842772a9fab6e. 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/9e5e6cf3-5f9f-49c8-b3fb-3466aa0a6b55.json and https://artists.proofprofile.net/proofs/artist/9e5e6cf3-5f9f-49c8-b3fb-3466aa0a6b55.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 0xdc475a138a5e2edca13cce162593cac10f12e5882f79679ff3afea23ae314051. 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/US83Z2107457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b398377441f915ceb33e30cb082fc0d5bfc99711e57ad09cec76539d87f36c5. 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/US83Z2107459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd649f5a755763c231d9436f877e8a09abc3adeef4a7e1e2042fa1fbfc3db3aa7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US83Z2350259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd6f3ac0876945fe4f3c595fda085912f8b05827db2274c7de4210ffb6a1837. 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/US83Z2350260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa744aef0bbc9004f2a32ef6489c65896c8c7a7b1a2fd98446802996a0ec80a28. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/US83Z2350261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12d0a7420573fe533e7972e74bad4ab665a1eedd42ce3fbbb6fa2b14ba1a37d. 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/US83Z2350262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3acb18fe910f9cb8371f3446bff77d3494d619b6f89acd1904fe37ac6bb194. 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/US83Z2350263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff42102cec5fe2f723fb2bfffbd1f659e2f930bf9c1841ef9e452652f4809258. 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/US83Z2350264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5d72c0fb9b56734d10c9fbe2284b93eb172f699b5ab04c8dc68dcf69abac37. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/US83Z2350265.
Do You Really Wanna Know - Lui Mafuta Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba26b6c9db54ce3c2c7ab214c0576703679f1590d7b54b93629eba49a701d534. 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/US83Z2350266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e959c63ff1d04e123e89c9c8ebcbb7f37cf00f8a9488614d9b1fb9e65f97a9e. 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/DEH742005200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513d6d8200291b58a10c5a0228c94092333cd4dcebfca504d045a0523174861c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US83Z2125049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaee442b46a21ba9ed76e42bc719d76d451f2eb3d5bc46c26c9e42b4596bc69a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEY472172848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0d48e2ca6ceda9d9a563515b5db40effbb8ac0182a7b23e71238d139b85fe4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US83Z2027574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ac049732ef50ab5149cd6062489faf767eac10114e410d3604ebeb6dde993a. 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/US83Z2125047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47825391802b7b1c85acab62502cae1d20714bd02445470349fca4daf2a49f53. 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/US83Z2028642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9afec8dfcbca1a6b3873a91665c278d65b74af246de8e454f84f17e757a26d6. 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/DEH742304371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b46c8b96f7eba780aeb18910d0d4a7510099f2c67066c8553f983cbba76460. 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/DEY471821412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47825391802b7b1c85acab62502cae1d20714bd02445470349fca4daf2a49f53. 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/US83Z2028642.
A Spoonful of Honey - Lui Mafuta & Puste Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d980a59626b4250e4cc76ce6d572a87c858aa72dd4bc264957b9e63500bbfb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL5BT2100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779c0a836b68eac921c6f56f62a4d65a9289b73af1b50a8a0a4cb1e7f94ef817. 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/US83Z2106531.