Baker Gurvitz Army were an English rock group. Their self-titled debut album featured a blend of hard rock laced with Ginger Baker's jazz- and Afrobeat-influenced drumming. The lengthy "Mad Jack" was
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 0x411d50ee4b98ab7ba9cd9b02ef28b24800a4770cb2fdd66f40af064c60f436fb. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/769f6afe-5158-4462-a737-80bbb041d1f0.json and https://artists.proofprofile.net/proofs/artist/769f6afe-5158-4462-a737-80bbb041d1f0.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 0x4c69b76557019cd805c07cb5f1de78a34818571d8069a4fbe1684c7788ef7c27. 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/FR10S1419423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3049f706c0633f35402c59ad975b14d07eedccf4ee10ebc60f17fa7202bd1bc8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:04:15Z), 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/FR10S1419424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494ab3c5ce5963cec2ccfe6828deceb5b25cf0e1760ae8a471e7d819a2a997b4. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:58:16Z), 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/FR10S1419426.