Four Jacks and a Jill is a South African folk rock ensemble. Career They originally formed in 1964 without a "Jill" under the name "The Nevadas". Subsequently, they became the first group in South Af
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 0x0da49beb79265183f0caa5de3624729e15c7aca433cb2c57791ec0fee0ff9ea0. 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/543f5372-34ef-4894-a35a-595072408965.json and https://artists.proofprofile.net/proofs/artist/543f5372-34ef-4894-a35a-595072408965.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 0x25446590fd384444a698c1c9c9b1095235b193f2e639f1512a87452da4c9d87e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:41:34Z), 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/ZAC032202046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa36eec303222989ef9d38457917ed5635156e1c5ab51b71e344f43958c2615b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ZAC039501274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f604efdf74570c7a0984be6c975783d8d4639dd0ca0b268ee32d17fd55580e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USA561033227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428608f09a56ed13393fc161837bf3a1eb780de05a1d5c3c94fe978fc8a01156. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:29:07Z), 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/USA561033228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5723c70057d77433df24a337efb2acfd528ca62e835f5b1480006b0f38f2400e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:41Z), 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/USA561033229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec5dd5c60febc4b23d7fba51434e14be69f36f874d3de52e56e7728182e04df. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA561033231.