Coldcut are an English electronic music duo composed of Matt Black and Jonathan More. Credited as pioneers for pop sampling in the 1980s, Coldcut are also considered the first stars of UK electronic d
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 0x352161d4755a0cf30cce8b8b8b9db8c97a1bdebfd001c3d69adc8aff854b3320. 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/0d263dc3-8b37-442a-b49c-2585e9d9c520.json and https://artists.proofprofile.net/proofs/artist/0d263dc3-8b37-442a-b49c-2585e9d9c520.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Aqua - from Playing Piano for the Isolated
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 0x7f4c1b429e52eeb3e3b96f51a9c6aec4c68a273c5aff3db3a3082db331aad562. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCFB2100577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57495a3d8e8eb0b781f8fce6a7710114c0d29b7b6bdc67f3eeba3fb8f3e59c4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBCFB2100411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3716b295e3593d841d8f252f8beab72b6beb9a632604eef92f53fc02139648e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCFB2100657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60acc76cd36df8fee8cee79dad6b07d00aeb54e5dbd0d2609bb35f58dc4213e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCFB2100583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd7f2024c2ddad45197645e27e3f4df9c9427d1497a48a5aba1c662fe97550a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBCFB2100576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe09eaac897306ae132535d3c039cb356dc5bce4ea0b14a469f96554ffc71a3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCFB2100584.
Rembihnútur - Liminal re-work by Paul Corley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b113b0105c87d953b803ff0e2885661e873db069c3b5b83fe0ee65a14282054. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCFB2100573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754b56f7ad5804b2d379cde5993e69bbc68f35a23b2feeca49cb7c954f7e110b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCFB2000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2c2bea5973c2f0cbbe99781d07cc189bdf33411c9357456a93f02c700492d6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBCFB0600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42c302dc0b0a3a997563b3e9a136a37411c8e3a8e9d0e31a71a0edffcef7618. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCFB0600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f709cf9a936c03c59bcc015938cd9dd7b893cb320d9ad07ca750880bfe434b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCFB0502800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc523305c2066ea14f3a0a24985968b38fb4c8d4a72f1c554ce04196433c9a621. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCFB0600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf141370145da32be71bbbe2b7f2cef5a46c8c133bf5d2379b7f2626cba2bd4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCFB0600013.
More Beats & Pieces - Daddy Rips It Up Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb632ad2ca0779ec9ed00d0e5786058306dcc8d18f1872f0f64f2edb99999b680. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBCFB9710057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f1c74edca74c0473ad5ed4c4ae71873705735495bd09e9a000816ceb7af876. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBCFB0408232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc876d192676d5626682172d0aaea680edbf13b0c42b3e4e4b486c776608d270. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBARL2101527.
5 Seconds Ago (Coldcut Just Say No Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd7f2024c2ddad45197645e27e3f4df9c9427d1497a48a5aba1c662fe97550a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBCFB2100576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2c2bea5973c2f0cbbe99781d07cc189bdf33411c9357456a93f02c700492d6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBCFB0600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec18c3bb2cde9e6f3cbbc081f10da97876aa15a8eb269fcac70bc0483aeaffd5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USRC10601964.