Leo Matthew Abrahams (born 28 November 1977) is an English musician, composer and producer. He has collaborated with Brian Eno, Katie Melua, Imogen Heap, Jarvis Cocker, Carl Barât, Regina Spektor, Jon
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 0x482a90b0250731bdd51e9d4a4a0df373fe7bb128abde023fc161bb133b41a52f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44fca72c-2f63-4085-9186-d7be3df79d54.json and https://artists.proofprofile.net/proofs/artist/44fca72c-2f63-4085-9186-d7be3df79d54.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 0x72d7798966d7919596cd92dd0bc0413264fc5155453d20c29f5e28883f14514c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBPW1000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26435a490d60445973d0421a9e9b85cdd3795408d053b96177144e0eb886a704. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBBPW1000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c5b57fbf06d747c9649f8b82f88844c9c1fb54cb21945c1483230a85f37387. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBBPW1000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06550dfd013c1ffb3d35d5eb3cb128012b100f9f3a28d81ce9e58951c6e9209. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBBPW1000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533d7fe754fa0a2105c11ad6408e6fc44ab9586d5ea35c2c6f1a978901b9908b. 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/GBBPW1000213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bc1e313c9064bb21c083d0571300441bc3f12ee14ca18c599eadeb93df2d1c. 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/GBBPW1000214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2229c3f336196f220e7ace8f3e718399e5be2bc55574880653e28f8a567a2e. 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/GBBPW1000215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a9e7425372bfa64739e62943345149c9ccd1c745e636771fbd37f8d8f66f41. 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/GBBPW1000216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c309e897d48b3ab8317ee5441be912a9213990fb25c0ec56a17db62986c270b. 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/GBBPW1000217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d1c2462efd202bf8284a78e84f6c165962eb46d6e98ea1f2af56ed74991624. 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/GBBPW1000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730cf1a630bd162a3cc5013375531b841790922c5650e40976a4a724ae1d0c3f. 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/GBBPW1000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9e07473ab29995f757cc4fcafaaede4a39730788a0ac566ff3bc976a1a94ea. 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/GBBPW1000220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9aa94d2af4f37dc4dd1a8766222e65853d127b0fd6bc558c1cdeb0591db2971. 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/GBBPW1000221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87d4d3d1cfe8c32681293474d2223503880cc69a519ac8f7f90556586acf5fe. 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/GBBPW1000222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c441e7a1cc940ae261195fd745fd4f58822c662686dadfdd5597275cf20eefe. 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/GBBPW1000223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e6bf03ecfe2a039d2549f6d9a04505661abb5c9ee7d8976b865b4698dc71c7. 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/GBBPW1000232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56331c68c2fbc38b305df2bf48810560cf14a842c176bb416356f61788c4022d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSM12303436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816776b6ca6f7ae2fedd88823e552492ccdc0c48362249b0a3dc04ea2162eea6. 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/SEWDL6020633.