1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xb4c462b25100fb16cee9651d1e69881e6d83dc738cb43c5ab827eb0010f7f36c. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e35a051-650e-41bd-98e0-ff3d0857a378.json and https://artists.proofprofile.net/proofs/artist/9e35a051-650e-41bd-98e0-ff3d0857a378.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chicago Now - Thirty Years of Great Black Music, Vol. 2
Chicago Now: Thirty Years of Great Black Music, Vol. 1
Mama's House Live 35th Anniversary Project
Kahil El'Zabar's Ethnic Heritage Ensemble
A Patria Amada (National Anthem of Mozambique) [Live]
360 (What Goes Around, Comes Around) [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 → block OTSBitcoinBlock must exist at that height 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 0x845e3f8fbfe05c1722f52e10c0ae12a43cbdc57c556d1f6b5696f2254d576cb6. 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/US4B90449603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bccf0eb9a02c0e0b6367e58175ce785320586d446908651265bfb529cf9e04. 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/US4B90449607.
Composers Collective: Beyond the Jukebox (B sides)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925a84973262a4068075c9438f131e6549bb03a172599c0c21a9eba1abc8a419. 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/QT3SY2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe587d69f3c8319ab9d23db0c46b8c2baf5cbed289cecd6e784dbe3172eed9dd1. 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/QT3SY2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e458fccea07a3769ee38c0723581c1e1342f7c2cc917e32bff34c93173bb84f. 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/QT3SY2500012.