Rozi Plain is a London-based musician originally from Winchester, England. Biography Rozi Plain was born Rosalind Leyden in Winchester, England, in 1986. In 2006 she moved to Bristol to study art, an
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 0xbbc04e25d9c6eeea1c3542fa107e3ba86fd3a7c21f7d48356ef827f46fbfbb05. 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/0cadac21-5ee0-4f80-889e-b2ff61e8f79b.json and https://artists.proofprofile.net/proofs/artist/0cadac21-5ee0-4f80-889e-b2ff61e8f79b.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 0x899c7806e8290c0c79b750db49c0a179847c6dd7163b016859b9954f5fe5b162. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBZDN1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe43e4ecc94ad31807b31b7e33de2af7f48e9b6c277d642b0a234f1241ae1edf. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/GBZDN1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a30a66efc58c6753c87d1394afa55c4d38a6d6b38cc5c24d15833d3bc510a8. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:42:15Z), 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/GBZDN1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7d1f1d7211db4c8ccbd134c701fae2f178bd7ef81516db64700e2c688c78b0. 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/GBZDN1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397de3463d5932eb9de6c8dfb418fede5cfb1765e21c8ea58d1a76dd374dd0ac. 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/GBZDN1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dabf58e854e0a510a6fa51e4aafedab955123fa98fd3e52329f74a817b4bd3d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GBCSG1800142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94468a3f2eea72db1991f8784c467dcf149cdbf1249b9fa35072e0a2429ad63. 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/GBCSG1800143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ca237cef9450a2be5d8ad77d467c6698487906e6623b07dc1689ab9d2ae801. 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/GBCSG1800145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541fab73bbdcbe9e821a5a8256648ebd10d863960c4bc0b1abd860d185a7fcf4. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/GBCSG1800147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27615124e20ada7a84306efc6da90c3650ef46b05484f6c358ca99804bcb587. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:07:56Z), 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/GBCSG1800150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94468a3f2eea72db1991f8784c467dcf149cdbf1249b9fa35072e0a2429ad63. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBCSG1800143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43563d6b181410442a097ba8e3b8552f3f38aedf72e27caa4b0d0fdedf70d0e7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBCSG1800144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ca237cef9450a2be5d8ad77d467c6698487906e6623b07dc1689ab9d2ae801. 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/GBCSG1800145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541fab73bbdcbe9e821a5a8256648ebd10d863960c4bc0b1abd860d185a7fcf4. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GBCSG1800147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27615124e20ada7a84306efc6da90c3650ef46b05484f6c358ca99804bcb587. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:29:53Z), 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/GBCSG1800150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffd8234f9b5b4541f71fc3cd17639626941a37901d9a8ed02e4e2f46272644d. 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/GBCSG2100152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb653c1b14573af1afa68314026a491cc1545bb8cd95ef18db3470ff0661ca625. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBCSG2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2027ec1c81e548a3a2cf15852720b2306915648530d82c0bfea232d9dda4c3f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GBCSG2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3883ac9231d1db181d3d148004e1dc21f4121551fc69b95a6b736d5ff18a9d4. 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/GBCSG2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb063f9a2f4b4f62330e5fa420dd42f0132430ecbbd843bd6e93a975fce6311b5. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/GBCSG2200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5577977212aeec8afd79696459506f543c5c474608a0abfd2ba1c6933484a59. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBCSG2200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc4db6c895469994c83a3836397cb7f52304e7e83e043aefb56d8d741130ed0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBCSG2200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dd9b7de1df3cd52b8f58f8d1e224dc438e2a4d257e49065faca41e774701c1. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GBCSG2200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb653c1b14573af1afa68314026a491cc1545bb8cd95ef18db3470ff0661ca625. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GBCSG2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2027ec1c81e548a3a2cf15852720b2306915648530d82c0bfea232d9dda4c3f. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GBCSG2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb063f9a2f4b4f62330e5fa420dd42f0132430ecbbd843bd6e93a975fce6311b5. 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/GBCSG2200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dd9b7de1df3cd52b8f58f8d1e224dc438e2a4d257e49065faca41e774701c1. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/GBCSG2200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdfe9517354e1e76a1d456c7110167088fc01b1345b2c96e8973757f282b79f. 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/FR9W12351946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bddbdead7e9fd42681300091e7679b920076dcdf5b3e26baeb14a4df020785. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBGEY2100262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7ee349a87091e5ec77c24df54312b94076aff09a037c1f9aa96968579f2665. 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/FRT092400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd008b4882995d831e198d6a1879c11760ba3d7e63f03af7ddb7dedbc6621c9d7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBZHA1200122.