thumb|right|upright=1.35|Landers, California at nautical dusk (20-second exposure) Dusk occurs at the darkest stage of twilight, or at the very end of astronomical twilight after sunset and just befo
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 0x255e2b50c1ce0b90fc5fc428cbdedb42551f135509d1f2fd5b0e3637412c0d88. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6a540b5-d8ac-45f3-a1a5-c500e9b043f2.json and https://artists.proofprofile.net/proofs/artist/f6a540b5-d8ac-45f3-a1a5-c500e9b043f2.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 0x70932ab1cc6018652872e0e85c86f91fad769e4dfa73c0adbc4d5311988478f2. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCACO1659977.
The Pain of Loneliness (Goes on and On) / Go Easy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686f86fc999e42079527a0474843e2297341ca205087ed620f737ec46fe9c25e. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:29:11Z), 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/USA2B1801407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8257b04fe09b8e0b39a67c745af8eece00da563ce8408541ca15a157709088af. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:30Z), 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/USA2B2317401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b266263ca38059378ddce179a1732de0b5d0295011d4a2c8ed618e19536949e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA2B2317405.