'Sir Colin William Carstairs Turner' CBE DFC (4 January 1922 – 21 March 2014) was a British businessman and Conservative Party politician.'Who's Who' The son of Colin C.W. Turner, he was educated at
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 0x213d90da416ab5edff4bda8b8a6907e41c029e9cad5c8b4cc1709ffcd942ef00. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cdd865f-8393-4ff6-a2d5-2844633e9988.json and https://artists.proofprofile.net/proofs/artist/2cdd865f-8393-4ff6-a2d5-2844633e9988.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 0x2262b28705db7a35b1b53f97ea2313cae65d3112512f06ba739c940b31da187f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJE2508306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ddfd1ed5b8586ba5ada307b296a52ee569061079360fc8030ec77a03e3664b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJE2508311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e4e30ea7ec590967ffb079447a1264e7e7d153393323e1860f56ae26287a9d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJE2508317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdb385bc1f91e8cdc46ed797835ed3369044f5d109defa1a0ddfceb743816e1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJE2508318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd8676ccd3a1dbd1f18dc8021777eb229913d28105348fecd8a6e734c1be648. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJE2508329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546618910b06b2c8265cd69e9cd36ba1f18f8ba7e9ece645b2e98e02ad06a24b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJE2508337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016073f55eb793b39289d14d80b0a9ae026745b21c39469b24b1c86531d6893a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJE2508341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd25791b3213ca0eea1e5f2151513490f993f9d8fbed9cee9a8014d35bf992a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJE2508344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bc73ac36d7f2e210717479d1e773c2854cc54ef59bdafa2a016e43bf5f9879. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJE2508346.