Arxx ( , stylised ARXX) are a Brighton-based alternative rock band. Founded in 2017, ARXX consists of singer/guitarist Hanni Pidduck and drummer Clara Townsend. They supplied the key songs for the BB
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 0x72b611522b3c4d71bb71561e3a9c9d6b78872230680cf4e5633e4efc85aa494b. 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/9b38608f-a8ed-43fb-81f1-287bd33d0353.json and https://artists.proofprofile.net/proofs/artist/9b38608f-a8ed-43fb-81f1-287bd33d0353.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 0xc5a43c016884eec687547780071cbd6d190c6e3f00cc94094929a9ffd5a42664. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:42:46Z), 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/TCAFC2036966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78899d25d91ae3fe2b594a61a3dbdf9db31f1eaeb057c80781303d9d5590da2f. 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/GBKPL2157658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0243e4d49ca0dc3760b51cadcaa1e0202ab771070d0656dd99511ca0dea6cfcd. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GBKPL2148547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01e39c4df987869d3a80f048e3232a213485aa85986ddaccecaf4bc72dd359f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:25:17Z), 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/QZGKC2201301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01e39c4df987869d3a80f048e3232a213485aa85986ddaccecaf4bc72dd359f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGKC2201301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df9b1a47096eefbb7e77c1d2d3018b5e195a5c5c67fb6a61b10b0afaa5d99f4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/UKG3X2200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f693e28177bdea536d3087f921793e606a4a9f1de5c4427cf62f56734da7bf. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GBKPL2144332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa649ee78acedc1c627d4185e039cea83e631520ed997b4ce6e714c087f730f4d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKG3X2200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32954aa999a01baa480a783a9a650440c2fe6931639d4ecb06c6c68fed4c352. 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/UKG3X2200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a5c610aa905da935c3f46c8610d3a5c0999feb6bce1016a1c2ae883422dc32. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:54:28Z), 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/UKG3X2200175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618985d0b33bf651afab7d6ba60f9bfeb6e51d953484bfe4f23b6538b84f1ead. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UKG3X2200176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4eabff26b818d3ebc9b5c6c1ba588c5d222279a5f22849ffde0caff364d6be. Chain 2 (Bitcoin): anchored in block 957827 (2026-07-13T08:59:54Z), 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/UKG3X2200178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf709630a62f63a7d0cf7583b5c2de85871dc676b08efa91bbdb7b9a91c1236e6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKG3X2200179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f693e28177bdea536d3087f921793e606a4a9f1de5c4427cf62f56734da7bf. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:36:58Z), 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/GBKPL2144332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42600cd61b887a3009c05c4ba0d1019265e42434d5c4888772fdf6638e1af37e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKG3X2200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4eabff26b818d3ebc9b5c6c1ba588c5d222279a5f22849ffde0caff364d6be. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/UKG3X2200178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dfc6b0895873362a9787ae1e644fa86aaeb3682fdd9ff0dd374226b42719cc. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:38:30Z), 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/UKG3X2200250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a6ecc748497007fe9be2c498f56a8d11a06f5a2f57659f90a000dfaf79bc60. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/UKG3X2200316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9951e27bb23281a301acc0513d5d437d585c461dcd2d54074ad68eb57e97139. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/UKG3X2200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a6ecc748497007fe9be2c498f56a8d11a06f5a2f57659f90a000dfaf79bc60. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/UKG3X2200316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494a47efa3b90a6ff42a089ad3a833feb7845b339e751ef45d201dc714b7b3a9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKG3X2200329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd48f4652308e2f71d21e09b59e578ac8af7bfe235805579bad9bf77a7113bb4. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/UKG3X2200327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3425b1e25ddb4df01d8639006d352c7a29652f4c92003da31de4a8a8f049c7ee. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/UKG3X2200328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494a47efa3b90a6ff42a089ad3a833feb7845b339e751ef45d201dc714b7b3a9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UKG3X2200329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4d676d85c81e8abe254b54e215633a51b993fed8c30594fcbfc871688d0dfa. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/UKG3X2200330.