Sophie Alexandra Jessica Barker (born 5 November 1971) is a British singer and songwriter from London, best known for her work with the British downtempo group Zero 7. Biography Barker left Universit
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 0x8eed9697eb19c1610358f691b7603933a2faa8bcec44e50b21778106c6e6e67c. 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/32a9bc6b-d91a-47bd-9741-8ead71cdecde.json and https://artists.proofprofile.net/proofs/artist/32a9bc6b-d91a-47bd-9741-8ead71cdecde.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 0x4698e9afd3d9891e600ab491c22bc147ab4e893a1ab792a6aeb9f82cf7cff978. 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/GBKVH0600078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438f486c5dbfd6398ce3bb6091ca59c407b4c39705f9cd9adc0ebc5154539dac. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/GBUFC0700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7e2045351a7795619a2b1c864b2b6f156fbfa3d950c5d4d10688c5d9c2aa91. 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/GBCHV0150451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506a4a9961e57564fc35fdf66280040d338eb62519039c7b99b3f8419265aad8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLV62216866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efe366793ddc38efae266aa6d060dd46f3a0d8a3c703b7df516c854f5ce8920. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZAPG1722747.
Music for Dreams, Vol. 3 (Compiled by Kenneth Bager)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e83425fd3b998a467d17a7313d3f6e0b4de0fa46b3bc7ae02f4e1b0fc253681. 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/DKAZ70517108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a3753fdb9604a752cc2c58a7c7d46abd7c998533e66d94bed76413a54516e1. 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/GBAHS0300913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88829b158e8da5ad36a051224d47a6f6fee17f501e1d69e2593913582a555d3e. 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/GBAHS0300919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af76118d3816d7704542601350de90a46ff64076170f1ef8404e6758b43a7e5. 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/GBDLM1900131.
In The Waiting Line - Dorfmeister Con Madrid De Los Austrias Dub
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf369b9df4f39d7848fe6eb5a86f9cc61a7dd078a5b59289cb45fce54b22eb45b. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBCHV0150452.
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
In The Waiting Line - Aquanotes Naked Adaptation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacaf9a8d8c37b22b183581659d16627bc13345c3ff2d3a4f0829992002a50c0. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/GBCHV0150455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d11958bdefbfdc47e376de2137c5af62ffcca55e14dc783a58a4cef6432644. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBDLM1800236.
In The Waiting Line - Slide Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b06d2598dd75e13a589aea7dca1143b40d642116f1d76737f4681c72b5b14cd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBDLM1800237.