Capdown is an English punk rock band from Milton Keynes. Originally known as Soap, their songs have political themes as alluded to by their name, which is a portmanteau of Capitalist Downfall. Mixing
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 0x1d9129b6f02db849e9c83b6cba548abad3f36cadf0dcc39f238787b6540f1ce6. 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/cc602569-eafc-452b-b8f7-99f655bed4ea.json and https://artists.proofprofile.net/proofs/artist/cc602569-eafc-452b-b8f7-99f655bed4ea.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 0x89aa0ab0bc40e99437737e85724d9d08692ec28ad83df2bedea8809488ee14ff. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBFFA0600315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5c9e2cd0f1368b9478524fdebb886e164c591f58300ab80f801ad2c52ff888. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USA560600125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e48ca8a27db563b38671c8fecbf57b4890088a3bd986df25e5d7bbf6e34ab2d. 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/USA560600129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab911c65e3a9a16d81dce03ec207021d8ef02f570384895de27ce337a7c760e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA560600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9a872f86b53c1513018f51e99c5d4b3d5cd805b62003a990c5317901150887. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USA560600113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9151bd475d57754c991d9e1dcece04ce61c890fdadb1de74b27ddcd731c244fe. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA560600114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb0b14a1385a41e4e026b5dea7d2280badd0eff31b825215df69859f740a26c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USA560600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c350b3cb0fa592941c75df8fc09f36816d6ed784f998d8c09d1636f4b92d4fb. 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/USA560600118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a46c16b028afcd920949d7b81c61ca9bc9c0a63d06ef43fa8a3e9f5272de0c7. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USA560600120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be0346f1fc6e391710b053e89c4cd874833771f8d3a70a27be61c34c50b63a8. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/USA560600121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0362e181b81cf44776f0a9e90e6c962d1c46001292fcc45dd9eb1b697c811f3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA560600122.
Keeping Up Appearances / Serious Is Not A Sin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a39fdf0f98e5c1f333f7f1db0e78e17081e72437a4c6a199acf7010ddc2d717. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBFFA0600302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55d3b85b98b73d88ab82c40d8f7559c861c535cf293c57e098a6693d3aac73e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBFFA0600314.
No Matter What / Community Service (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcbf1332b858c4be0ef02579c72fc4a6d46a3810df8f7928e8e05c755027c1c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USA560638581.