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 0x75322cf1fee7aa1814f95520c11bc40cb10f5b495fbd1d3842253246c53d2d4b. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10bf647d-154d-4454-aa2c-04c24c286ec7.json and https://artists.proofprofile.net/proofs/artist/10bf647d-154d-4454-aa2c-04c24c286ec7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nothing But... Hard Techno Essentials, Vol. 22
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 0xcb14a4c2135dd4bfd4a3a73b26749845a82ecd730f2e921498f36b1435f000b7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:27:48Z), 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/FRDKW2400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fa19ac5f8cde5bb1393ad2a0a510b149e14e82be9fdda29ce08fd6f489b7eb. 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/FRDKW2400280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95ec845004645d97fd325c5fe9d542cc68d85ac7acad4b72ee050e3746b2629. 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/FXR752400769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd478ae1efce040cf967599a80f3b339a9f4be207a25a34e805f4b5a13e2ec49a. 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/FRDKW2322477.
Nothing But... Hard Techno Essentials, Vol. 23