Ian or Iain Matthews may refer to: Iain Matthews (born 1946), also known as Ian Matthews, British folk-rock musician, and former member of Fairport Convention and Plainsong Ian Matthews (drummer) (bo
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 0x5809b13e41c677e0d2663d435d3d43dc49f93c37e99eba74b106de6573fb902b. 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/63658040-6a4b-434c-9cac-b2d788d008a0.json and https://artists.proofprofile.net/proofs/artist/63658040-6a4b-434c-9cac-b2d788d008a0.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 0x8dd1e7f6503c4b993cc2461b8a392c0063be971c3d074d3cd939a178e3052954. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USEE10184754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29db5804748fa57363bdb2e9c8d82e54413e55bd2720751b32bc61afe3d5101. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USEE10184756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9fdc9f1b191030446e8a76b52786fb07d89f433e4613f312789ef5fad0e440. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USEE10184758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd6b526e33ddbaefea0beb7ab3bfeeef0d565e9691377d8a8f65dfc4eee5f8e. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/USEE10184767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bf2dca0796a8bd2a00a400e55171a026a2ac8368f156c91356aa89227a08d6. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:07:16Z), 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/USEE10184755.