Alex Heffes (; born 2 September 1971) is a British film composer. His film scores include those for the BAFTA-winning Touching the Void, and Oscar-winning movies One Day in September, The Last King of
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 0x1c77c9656ac1ed783937920662cb7c7ce7f0531bc804a12444a60f0863f3ef2d. 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/4aa51517-03d2-4823-8486-cd8ea441f206.json and https://artists.proofprofile.net/proofs/artist/4aa51517-03d2-4823-8486-cd8ea441f206.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Regime (Soundtrack from the HBO® Original Series)
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 0xf6fc8789faf0901cc2d1542cf06959d1b4964d48b4173bfe6bf196c7985634b5. 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/USNLR2400116.
Knox Goes Away (Original Motion Picture Soundtrack)
Mandela: Long Walk To Freedom (Original Film Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212afcddc338b060f73f95796de16c340dc033cbb1e97e4fee7e7ac0e72aa950. 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/GBUM71307024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced0aa63790e0ecc911b3d5d693a81b2c5c065d6a50c32fbdf21d3f178203494. 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/GBUM71307016.
Taking Office - The Long Walk To Freedom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb2b9f200753010d5afefeebb6a448c4898402da25abfcb17fc9a3197c9c691. 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/GBUM71307019.
Mafia Mamma (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c6538502addcd8c8f51de4a400c20098e730436f6d23c3f931c8d41ee63f21. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM4TX2385382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1399a1faac9a2c76fd9df587e57ed535a09d2e2270de65fbec4ae527bb316d. 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/ITDGZ2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f515be221c726df468e37c4ce52d2f28f46c7cf551606d43efd08ff2312f2b. 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/ITDGZ2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddac83bb10b70a2b22fe8fa6521792e83b51dc6f5353d0b80eda35266fddd8d. 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/QZF921800001.
The Arctic: Our Last Great Wilderness (Original Motion Picture Soundtrack)
Die Elefantenmutter (Original Motion Picture Soundtrack)
Miss Bala (Original Motion Picture Soundtrack)
Pickpockets (Original Motion Picture Soundtrack)
Earth: One Amazing Day (Original Motion Picture Soundtrack)
Bastille Day (Original Motion Picture Soundtrack)
11.22.63 (Original Television Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528dc5fa173cdb85cd59de46853b2127828408e149ea79991ce88fd2f49587a7. 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/USNLR1600093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b26dc054b4aa1c38f77d469b405ede28d97bf09d33183d73f29695fa9867c7. 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/USNLR1600099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010d2592adacfeaa277c37ab15f3746ff81f8c1a53a3be134d6ea6f6b5081d6c. 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/USNLR1600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015b2546bf7e3359e8256bc1e20a5b22d35f723c431d003bbae3e70fa28b9aee. 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/USNLR1600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66668e25b77c312b5bcc55ac842ce87dcb2f6fea91f95f119bff8d9f58941642. 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/USNLR1600111.
Escape Plan (Original Motion Picture Soundtrack)
Emperor (Original Motion Picture Soundtrack)
The First Grader (Original Motion Picture Soundtrack)
The Rite (Original Motion Picture Soundtrack)
State Of Play (Original Motion Picture Soundtrack)
The Last King of Scotland (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be8e3baa56a22ced420a53c5922fa6305a24f39cf41040c116549d7e795fcfe. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US23A1571153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3c5244d7b7aff46b85c8422bbe399cfd633029978ceacfe49dde6467ee56e6. 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/US23A1571154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0cfe5ffff2446628f1f0e140eb6faea567e2705b8773f02b312b464c9728a0. 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/US23A1571155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088823beb564db216c643d25179c456e947c7ffa3b252538deeb0b362842844b. 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/US23A1571156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3c5244d7b7aff46b85c8422bbe399cfd633029978ceacfe49dde6467ee56e6. 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/US23A1571154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be8e3baa56a22ced420a53c5922fa6305a24f39cf41040c116549d7e795fcfe. 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/US23A1571153.
Hope Gap (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa578c343835ea71a12cd0fdbe8bd5821aee9e9fe08b5168b4b47494fa276a23e. 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/UKC9D2035001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc41914252e6f396e63d11ae7f0974cba4aa9e18562aa32cbec9b6d9c0226884. 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/UKC9D2035002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23abbc6b1801541717e10c641c8f6de92c4aec59572dc9b5553b8d8f26cc00b0. 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/UKC9D2035003.
Edward's Story on the Train & Grace Is Gone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259e0e456c4827a78b450cc13565d955eb75231e6316326459e887834c87c708. 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/UKC9D2035004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa012db8869672d22a262e2bd797e0c5768a76e67c0cdbda2338a9b44b5dc003b. 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/UKC9D2035005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0b7af2ba1b7a04a24aa5d7273feb08668ed04fe9a150bfbd4f759fa12c0309. 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/UKC9D2035006.