John William Cheek, CBE (15 February 1855 – 26 February 1942) was an Australian politician, who was an Independent member of the Tasmanian Legislative Council representing the electoral division of We
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 0x02652982275beb1fb07dbe9e8e46fa717e1bb80ec2d7b3dde158f31bb15930fa. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c24d5ff5-59f1-4b3e-b3e4-c35a2bfcc960.json and https://artists.proofprofile.net/proofs/artist/c24d5ff5-59f1-4b3e-b3e4-c35a2bfcc960.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Coleridge-Taylor Perkinson’s Sonata No. 3 for Piano
Puccini: Tosca, Act 1: "Ah! Finalmente!" (Angelotti, Sagrestano, Cavaradossi)
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 0x2cf7c41f982dfc01b39b256560813dada83bcf6a6ca3ab5fc8c432602a5a0ea7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAYC8000143.
Puccini: Tosca, Act 1: "Gente là dentro!" (Cavaradossi, Angelotti, Tosca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53428bc6050aebaf92221a3b657de6e3ce493d42560ba129a50cffbc5718fd5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAYC8000145.
Puccini: Tosca, Act 1: "È buona la mia Tosca" (Cavaradossi, Angelotti, Sagrestano, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb57077233f03869e95b66723b7d2b488960be6d960d230223e87f8e73f003d8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAYC8000148.