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 0x066b91452f12dfccee9ec79387d7d1463f7f31aa950c90f08a36a2fb6e4cbe5e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f08b5787-6c9c-4e42-9dd5-8d65fac92f66.json and https://artists.proofprofile.net/proofs/artist/f08b5787-6c9c-4e42-9dd5-8d65fac92f66.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 0x03026caaaed9f5472c6c9f4ee283df3f5871ffe794ce744ea3931fb1d86dbd2a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/BRN150800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d67fdd6bdaa2f4ee36a3138199192ed384998d35ff72b4d6fb6c1fd720d033. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:19:18Z), 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/BRN150800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6f6f295b6f7472445638d5b2a1754654913ded9a1bf3a6c99951fc369fbd26. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/BRN150800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb8ae3f9e3e2972717f552222f859a7675c2ef0444fab5eedcc11c9f2bd26ef. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRN150700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b970f0c276644d7d79c78bc770ac2a2882759ff5576359289fce02d8a6a94c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:49:20Z), 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/BRN150700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c937b8e96508abd0990b69c28d5c70b60c118d13fc6fba6bd63b21f2983596a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BRN150700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a095deb71668f3adfa285fd55a6dc74330f2ada38cc953da0e82870734c782b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:00:22Z), 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/BRN150700027.