The Varukers are a British punk rock band formed in 1979 by vocalist Anthony "Rat" Martin. They produced their most influential recordings in the early 1980s. The band play in D-beat, the musical styl
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 0xcdd24ebe6b8cddc182bf63a607541be6e69fc147b901e00eca61c87c92a3ab7c. 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/887b35f0-d35a-4ac0-b10e-0c06d6493b9b.json and https://artists.proofprofile.net/proofs/artist/887b35f0-d35a-4ac0-b10e-0c06d6493b9b.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 0x533a2ec2505ae8d4e198ea550a767f390bdf98dd6b1877cc25cb4d80e658ba47. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/GBPYM0720177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4779b63b5fa0ec6524e01be729fa5c1b57c8b39761f3c63cdcd574218006df7e. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GBPYM0740444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3266b9def5c26cbd766db5a7b26bd6feb6b8f90cbb69d7232751dd6746bd7701. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/GBPYM0720163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac14cea4148b2f59462a0944fa1f7d4d0dc837ec3787eb1057a4f5932b33892c. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/GBCST0135704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf2b283b44e24685c9a32813ec5ac2b141fa1915e0c9d1067030fa0ad061346. 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/GBBLY0606253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810733919e4edc28f696744aef5ae3c6dc1b3cf8c1a3e8862919b1ea4864f3de. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GBBLY9300322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f28693b37b1b393f82b709b72a3ce72b566889162d6faa85e6007f14606edd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBBLY9600169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d7cf50f8ab0dc802ad24ba1c567b7e66bebde79d813cf054285ad5e275a973. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QM6XS2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287c2358a0d9c98f671a6be8aca51aeebceae72d3dd380e0924cc361de67405d. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QM6XS1900258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055abd7e563c42d3bd022e5efe8e1fbde69781c3140576575098f0c78f60b9a3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QM6XS1900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b415df838a3ba65da7983ac8f63398e09eda8f8b147a41563410d6b4f917b66. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/QM6XS1900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80d110fb2ecfebbe54c386075fd753668ff4461e87091a19b1d42e610e0cde7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM6XS1900255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c75d08f83a1d3a653537fe55a67f8c7951299bb1ebf2964dfaabdaa532bdd22. 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/GBBLY0601557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060af9563efa2937592dae136eceee6c3aa9aa80dfea89b4d4ca6be78aef5fd3. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM6XS1901803.