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 0xe51311704c6e8075e1c18bedc75a82a4f6de371f31a9d4ef0b065981afd87422. 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/0c85262d-57ec-4597-aa3b-5eafb311d00a.json and https://artists.proofprofile.net/proofs/artist/0c85262d-57ec-4597-aa3b-5eafb311d00a.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 0x9a861ca02de78327dc2777119596fcef03f0a51b53b01395265f828ceb895686. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBBLY0607180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee02cd0e0b0a8d5c050e8b7c64fbeb61cfb8d3e657c731c411df03a6863a9415. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/GBBLY0607181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd6d1b7bd9a47f1e87a6d8ded6ac8fe17104d71408380cbe81a62dc29ab5c2a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US6YC1801077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23643162937c4c6ba784c28fa80c1d4f65a60d8dc69b15c1cf5f3c545050fffc. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/US6YC1801081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff70c35c3b9a5edaa3f9e78686d2433dd1570db1f56a5104dae9e909ca06555. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US6YC1801082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401fdac8b861aebc1dc655ca8133f38cc4d2bf9404b2f6476f917ff81e23c38f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US6YC1801040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xababe812d54caea90ac570d240c4295ba952f9529269f1e8ad192b8fc0b4a93a. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:26Z), 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/USCGJ0994317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edf234c9cc32774e89bd3a841023ba6c0424cce37b6c2e292b056dd87d8d9e8. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USCGJ1175245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9864b0066d90d095d4e0514071bae632e1f4993371a93e2a43f0cfb24d85d3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGJ1175248.
A Sam Cooke & Joe Simon Tribute by Wilson Meadows