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 0x79332c7f90941085b8b11de2b93e473fb73552c905bc50801329f2646c49d04d. 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/5f81253d-e428-483b-8a87-cf60f1cda023.json and https://artists.proofprofile.net/proofs/artist/5f81253d-e428-483b-8a87-cf60f1cda023.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Unstripped - Mac Roc Sessions, Vol. 1 (Acoustic Cover)
Unstripped - Mac Roc Sessions, Vol. 1 (Acoustic)
Medley: Praise Him / The Steadfast Love / You Are Glorious (Live)
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 0x99c4eb5a0cf2f8f762e9628e634cf5dffa9966280d36608e4162d87819be58ed. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/USX9P2377953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031a4873c08e14e13c0a769db1c9a3c2ff5cbb2dcabc41e2fa22e84c473fedc1. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZES82425659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffab08b650275fa6cfb7251a09262a53f004e0b9648da6c2d4fcef3bbf6e59e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZTB52462109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4007cfdb9b6e029c9798396314851540c4653f474512f76ed7e9535178470304. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN62543009.
Mac Roc Sessions (Oruka,Yori Yori Mashup)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd40acdd818d27af02801bbfebc56b94fac0e635f58d071df428995da9c065c7. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB32506964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf086274114fb006a6d7775b3a6d5871f0ba13ca8d1c392b97a8c0005375ba6f8. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZHNA2362756.