The Sunshine Underground (often shortened to TSU) were an English alternative dance band based in Leeds, England. Their style developed from indie, alternative to electronic music, and they released f
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 0xc9b944eec8faf8d2c5a9220fb0cd1c303c5abaa9acaa4c2480da5021640746f6. 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/bf5323ca-0ea8-4eec-9aa6-31ed39323965.json and https://artists.proofprofile.net/proofs/artist/bf5323ca-0ea8-4eec-9aa6-31ed39323965.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 0x5594a5057e24a43686f2c6a8bc977c78a20c042d2f0a3221e69cde5b3a4c98c4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBEEQ0600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83587477d781dda3b2a446bbac759427b39361600c1379a4fbf0325b09c4c3d1. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GBEEQ0600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3445ba58fc6fff985c812e545973c3414a85e12da772bfa932d3f145948a1ae1. 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/GBEEQ0600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6db7d9c89682e7bc9329abfd467010c8a3ea30d59b9c1431757d7947ec9d630. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBEEQ0600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8a3a10fef4a9037fe5fe49b373f7c805466e21e3b4ee56cecbe80cb7c09958. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GBEEQ0600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28610c54c0aed9582410b10a438940cfd4b69eba6dcb82b1e4b2285a0213d517. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:39:07Z), 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/GBEEQ0600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40789691df610f0e65fff8fcb74fa52dd3a3297aeeac574cb17067a5e2ca817. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GBEEQ0600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc5b0f212f09a2c350ee21055ac05d3f7d5a1f422c0e30c5e84d937125b4c1c. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GBNSB0900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dddee8e8943bca6d6aaaa9a197f0465329da33aa9c2e848a16cc0ea55ce1af. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:05:16Z), 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/GBNSB0900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1b017f91eb619d2d72f73b9d72d5fe7c6b370b59f723e16f87eb76ff5f5e17. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:49:51Z), 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/GBNSB0900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddaf317577d33a6250dda4345efb28b50bc4eb2e0bd957f321dde1189974c5b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBNSB0900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4a5db63e602ebe9aab8ce1e3e92f944a6dd186c3c2b98d8c37d228c8076112. 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/GBNSB0900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523996fc887fe9698c59a82fd7b593426007fad9c9c94e7473080de5f218fb2f. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:44:57Z), 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/GBNSB0900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bd6b1ca9c8e5e2e5ccbb1af6df88d26b5d64f85874cc72da16752e6fdf5c60. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBNSB0900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc696fdce187c72d408c7b81e0d135e83bf3a1b3012e6a50305fba32145a412. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/UK6HM1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988052f615430fb8088eef78e5c6a16ead32e3d462fe2ae5ae406fcae0a293f6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/UK6HM1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae0f53843406d49b6ce99faa21e78596f9577aa2d1e3bd3059babaccce43323. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/UK6HM1400008.