Paul Croft (born 11 March 1951) is an Australian arm amputee athlete who has participated in four Summer Paralympic Games. He was the Australian team captain and flag bearer at the 1988 Seoul Paralymp
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 0x30b1920745fdb7d26eba43215fabb2765f3832628b075c04163a1b6023e5a246. 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/4f1e0456-552d-4356-ba55-e17f8b2ab973.json and https://artists.proofprofile.net/proofs/artist/4f1e0456-552d-4356-ba55-e17f8b2ab973.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 0x6f307c6f0a7316b2aba8c5400cf9b62db9b5cb8899f01e5463643a943849bdc9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM2PV1507993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224120b2902c1b214943026e907dbe661f6394949ee79b56b8c2281907db63aa. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QM2PV1507994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7595ba45b9f41b1fd26c0c7848974b69e1d7277e32b6435166a5276010c053. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM2PV1507995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b3613ccf24733c38f8e2c28455cff583b3f0144711e786366e0d73b9dde7ec. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QM2PV1507996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a463996a93caa9495054a1811f9eb638c55b4900778fbbbe35d06572049641. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM2PV1507997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4491f618c6c46cb16e8f6e903fd18ca440d0633fc263526c8f5a1216a3db44bd. 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/QM2PV1507999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882aca91d4ffe3b02a20ee6448805b24250eefe074adcea192f40b1cef9c5d52. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:01:40Z), 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/QM2PV1508000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1f39610be6d76a7b6fbc88ae85249ef9e563659812f912f77f4fa5048b38ec. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QM2PV1508002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50c5ca50b0c634eab31eedf4fe67ace0360bee6d80dab2ef5a88d54680acff1. 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/QM2PV1508003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2369f42e5a4e95d56f58c39ee0ca9e82c1ddc32dde40ea5813d04caa0424aabd. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:43:51Z), 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/QM2PV1508005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3eed75f1d82966647d0a2e6fde4276231dd314e16c848385e40f0897f473f62. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM2PV1508006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48a29a59d4a21102bb59faa35f2f6ced6d0ad23e74397cae968fc02a30b1ad1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM2PV1508008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbed43a449253c57047daeccc020665a3a6b2feb280643cff5ce3c94d84f1ea. 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/QM2PV1508012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6407ce12f86ac83f353d3083cd7070a319fbc4ede8779e7008e622664d1d364. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM2PV1508013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122e1462c8cb893f8cb5afb8e1738eb7896439c3e13a7c3c08e6eb5a05502599. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:36:07Z), 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/QM2PV1508015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae95c689cc83d8501db2665800271156f827c7c63a9e203b0a75330185bebbf6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM2PV1508017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d74e650ba04ef7a1b02d721ee77a1055cf7d64c08989c564a555defb1b24c2. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:53Z), 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/QM2PV1508018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5f214b6a1e908a8a0ee85dae3ac0b176613b35be57af3c4ab6374c4550b3d6. 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/QM2PV1508025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9dba5090264ae6e04134f081815dbdb2745486d02fa5ced35d99a76ed07120. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM2PV1508026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ad6fac2fb12e60c01b709c86f8434786e986ff362c9aaa49ec19aed4c6817b. 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/QM2PV1508028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2504b292712009a57168e7995e82864e2eea3482e0b5af8e529b473cf7386cae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARIXB2202073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6169d202367805c98b7200c2b3fa3e969aea6fb846e9d63c8d81f9a96c8f944c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ARIXB2202076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7398c17d2459d8baf12c20caaceaf3e7b524d9d4085fa7ef0a7a31cde02629d5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARIXB2202091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b55e5e59893430ad19c3a9fd45605935dec8023931149a043ff6b378eeda864. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ARIXB2203205.