Mark Sutton (13 April 1971 – 14 August 2013) (subscription required). was a British stuntman who took part in the 2012 Summer Olympics opening ceremony by parachuting from a helicopter above the stadi
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 0x20c11bb253eb7395ddf0d26987e7205a64ab7878f0160e5e05b5636e632bcddc. 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/25f0d9ae-22ff-4b45-823e-e6dd2c9cec25.json and https://artists.proofprofile.net/proofs/artist/25f0d9ae-22ff-4b45-823e-e6dd2c9cec25.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 0xcdfd2bc45dfd953bcd404b9888583415d8ade4c772d37144f5bf934fa20f5309. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLXX2001166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dac0983654e9850215d7f1c4ea39bbbdc139ff2561a377d3c8a42a92f671ec2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLXX2001176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4830017de7c3681f82c8ff6d0f09e070e7f0e2a7dd3704a2307bd8dfa390d7. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GBLXX2001178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438abc9968f994a104c2c7dc68708db0e2ff5edcced27c088914816d6215bc8f. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBLXX2001179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab92d4e92e7dc85dac6aa6d60277879fbbb15fda56fa0a24ebb02bef3b4fc4d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLXX2001181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d35723e26b62dc0c4c42d2e6fede4dbccb37c09146b8e3723f34b5f2367555. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBLXX2001185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826289a7f1270dcdfb78d046dfaf9872f3c8a5e09e4e5a0e88d3af2b5d451169. 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/GBLXX2001186.
Pure Felt: A Collection by Mark Sutton, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaff0ab4c2bc03976bdf11a56635635ad47dc034129db88a89f99f177885a057. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUMEV2309551.