Gary Sadler (born 1962), is a male retired cyclist who competed for England. Cycling career He represented England in the 1 km time trial and won a bronze medal in the 4,000 metres team pursuit with
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9350d5fc025a29a8c9ab28f685a181b67bd27c4185bd23a0cb78036b8fdd7c77. 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/3da5f2c6-ff6d-4aab-ae6d-3f823d17375a.json and https://artists.proofprofile.net/proofs/artist/3da5f2c6-ff6d-4aab-ae6d-3f823d17375a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4d2aeee4d1fd078df067bc38f0e080493c92d93dcf230534fd86bde5287c1c. 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/US25L0802077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000a5460cd331588908cfa2f64235b9c919d659c47836d3f3fca44b70d51f95b. 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/US25L1001456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25362df851e4a94becf0ff666542604c581aeea02c19ead9e73bb0598b5c25fe. 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/US25L0501070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12346fdc14497010afe15db62fd91e11264aa5d7231b65a1c3126c3e0ab04ba3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US25L1001458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4960bb7d611963ae668b6e963cf0827042c683743ceba88ea6da3af8f1d5ef45. 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/US25L1001459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31f14b3a59ecfaa772180cf045e390f1297f2679313496e1fbb04592f0088de. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US25L1001460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dbc0d9f165e191b0d9510c01bd28ccecf13abccd42ed30ab9307275f3836e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US25L1001461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb28154cda220db129dedd6d66dd1bb0d9ad6c6b2aec57334b6efb71b10b1d4. 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/USSM19703261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62680cfbd3d9e7ded6fee4dddecc57346a00629133b4d788cf2e9ab6ab4b77d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US25L1001462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3968f52aba52c28f1d40604d78ce9eb01b01c8e24344a4c9a5db5195df383d68. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM10100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d9d05942d46a478c78223d1dc5439f1deb83f42560f7801e263978f74dc4a1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US25L0800901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63d901ba6fbcba7ff9c1f6d68b6cf43007df6851cd82af9e40eb0aa4ec34fee. 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/GBBTM0568710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5997f8d16c7cce73968b88a0b88e185d003939a513601a7a85c044ed497ac3. 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/US25L0800594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7b29f9952d48cb87a4b5fa60b9895da91a3ecd177514323eb14b3b789b454f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US25L0800595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7998afc3d5d3513d2c4150e0ab25327c8dea4f6f1f60854ff3febbd6a3e8fc01. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US25L0800600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35135e94d6bac1cbf39e19537d9ecca809eb8d25a5ec26dd266971898dacb95d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US25L0800601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf835b6d4bc1155f74464710c62ff55fe0bfb6e4dbb073bb6997990347790b675. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US25L0800606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3a3f957067b03ad5537645dc3cd0e6f945afd88a929d24ab1b4520d8ae370e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US25L0800607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25362df851e4a94becf0ff666542604c581aeea02c19ead9e73bb0598b5c25fe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US25L0501070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac3836e19dba4b85dc2f05336d38abaaa0d12477e125fe5b811bd319c1a1bab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US25L0501074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad1f4974697e4250b54b7108cbba76049b7ee75a39bce5af5411b2aa3175155. 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/US25L0501075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f544d4ea1105a0a3c502ab7bb63247b6be50fe7363f79154971da13eda6e73. 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/US25L0501076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a741aa1badd73d841bc959b648e86811f303e306ecfb56d2c92dc2b525c6ca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US25L0501077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeccb500e23a969caa08436a1b5ce8eeab3746be9faf9d0dc4c08b44d2040dc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US25L0901241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d7fb546d717c088e597ab8d348887c236e0f7d280ade0ba61fe897eb86d689. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US25L1000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25362df851e4a94becf0ff666542604c581aeea02c19ead9e73bb0598b5c25fe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US25L0501070.