Callum Stewart (born 14 December 2001) is an English professional footballer who plays for Aldershot Town, on loan from Shrewsbury Town, as a forward. Career Stewart was born in Leamington Spa, growi
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 0xb9ea516041da53b33a55afdf5e72fb62770a6d87da6877ef9737ffc7621b095f. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8c5fd6e-748d-4ae6-8a9c-55805f3431b3.json and https://artists.proofprofile.net/proofs/artist/a8c5fd6e-748d-4ae6-8a9c-55805f3431b3.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 0xa1345e6190f81805ddc87189df5ac6e930ff2bbf9b428201a135d3fa6fb752ae. 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/QZNWS2443019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd84169c2cd00ae83e215b07acfcd42cbaeec03b11df8cb23658ff8e6080c66. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:55:53Z), 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/QZHN82526217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f5d04a5f2da55567583f2d4121ca55541891427885ce7e4d8b748d7afed57e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:28:17Z), 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/QZTAW2513897.