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 0x6041d5df34fee705f50ec7e6d750ba9be9f057797fae33a50cda059a6f072862. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3334436-3e5d-4c4e-ac5b-8a497f91b390.json and https://artists.proofprofile.net/proofs/artist/c3334436-3e5d-4c4e-ac5b-8a497f91b390.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 0x2ee2810bb6d709e7d6495f4f9a036742762e558151f3082ed2243358ceaaf538. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM9Z91900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecef994f1e052f9358cbbe8af55330bcc3ce103d46663b2f08bfcd13da35d1e3. 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/QM3JE2402516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dab7a5c55c486c22d4dc5fb06e4512dbae8db7708ab2abff386ebcccbb573d3. 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/QM3JE2402518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31da841c8252c6acdab73d4c29e2ed62ea6e63e610f08dc1a12a8091980f0825. 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/QM3JE2402519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cd079fc665e9df0ad35b4b686cd705a22982310619a4da462a0f1fd6afe5b4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM3JE2001231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cbeffe3ddebae38afe29172247607e5cc2f825ab635dcbb8a145ea9af1522f. 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/QM3JE2001238.
Hear & Now (Live at Bunker Studios 2015)
Nick Finzer & Chris Ziemba (Live in New York City, NY)
Nick Finzer & Chris Ziemba Live in Memphis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31da841c8252c6acdab73d4c29e2ed62ea6e63e610f08dc1a12a8091980f0825. 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/QM3JE2402519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecef994f1e052f9358cbbe8af55330bcc3ce103d46663b2f08bfcd13da35d1e3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM3JE2402516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122ebdaed09d3dfe47796dc82f235c65b7a2cee25f3a13f3164e451864b163d0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ6BJ1803701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913b7f1f51724717468e4bb28e901e83000e57a1085fad943fa7f966fd5a0a8b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM9AA1641958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43ef7b5f251a961eba57e134e95176cc794ee4a1b62138502d227c49ecbb44e. 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/QZ6BJ1803703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c797533fc4e0c6019d67e26a33e9bb95c7db80c0c4f6cc75565f56a3d970d0e. 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/USHM21370953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb07a9ef2229db8d025eb95fc24a69522b5fe98417ae8ebab158ff74a89a9374. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ6BJ1801701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c429288685a934ee3e427beeebb531b259d1765d75e1cc2c9c34c702da59c80. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ6BJ1700311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bae0411c4d40568aa78d763ea9c255dd00a152e41a83c2ea63824839b801c3. 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/QZ6BJ1803702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9fd6b35cc72afe3fa3aa38195a4b6814bb6e2ebc4021838af72d9490e64a5c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ6BJ1800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a166531f9791d06f1fef357c92645d3a104a8b5177549995fcba3432f07f199. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ6BJ1803704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd414008f7da25381c9c4f54a5ddf84fca7195bc0741f326b49e062640b4fb893. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM9Z91800130.