Ruby Rushton are a British jazz band, led by Ed Cawthorne AKA Tenderlonious and based in south London. Discography Albums Two For Joy (22a, 2015) – Ed Cawthorne (tenor saxophone), Nick Walters (trump
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 0xe1acea20b1eb15dee50c48580a1afa01829d862a54574be4532f05541815c45d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88ab81e4-7a91-4113-9d77-253c059c2549.json and https://artists.proofprofile.net/proofs/artist/88ab81e4-7a91-4113-9d77-253c059c2549.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 0x330a769bd8bd7e5b99b90e34c1095473069a785b1b5e3bdcc0d7bec4a88f9129. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:49:48Z), 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/UKCFF1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4346c0cd68377ffd4af09c020a63a9862dc49968b10ef4b1aa62c32d718b528d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKCFF1700049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3247f333d1382d916ee6ff2307bf8e2fff3ecd3d64fa858f299f570890ff2c1d. 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/UKCFF1700052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e394a496b5f4e47df117da5e2455265e0ae30daa2ca0cda7880f61aa7e4cd4. 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/UKCFF1700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a06af174d3f3a339d6d0b4cc4434ed2d97839b6e127f8fe44f71119811d83e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UKCFF1700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87786b2fba15f0f2e222743b1347db2c5aa4c4179b668f83846e5d213d7419ce. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKCFF1900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b42f34c6e75fc0b57540658ce0f79e9920402c01543fd3ed4136b2cb2b76089. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKCFF2400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a56828299e045cc4cf7fa5a64ac3799438b47ce099b4a1fec7f5bd501504be5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKCFF2400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52de150b1e34011322537bfb8a637b1e48b760aebe6f5e4d766345e4d788fafd. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:57:15Z), 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/UKCFF2500232.