Colin Harper (born 1968, in Belfast) is an Irish non-fiction author and composer. Background Harper was born in Belfast and graduated in Modern History 1989 from Queen's University, Belfast, later ac
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 0xd78db6199962aae4d49b848da90c4cd8c6e1dae54e253a3de5619b96f7eaa9cf. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/562f1590-8083-4fe4-9411-fd9e93d39ec7.json and https://artists.proofprofile.net/proofs/artist/562f1590-8083-4fe4-9411-fd9e93d39ec7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Dam Busters - Rousing Songs, Anthems and Marches
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 0xf8117ed976ac93f068179d33f384f13f988d1a6de91957cc1ba845b8d218a8f5. 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/AUAB01150389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8117ed976ac93f068179d33f384f13f988d1a6de91957cc1ba845b8d218a8f5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/AUAB01150389.
Spitfire Prelude (From "The First of the Few")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a603d21bfdeb74dea89a184c53033135c7d60e08a54153dcd243e1aeda3f87. 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/AUAB01150384.