Rupert Gregson-Williams (born 12 October 1966) is an English composer, conductor, and music producer best known for his film and television scores. His filmography includes Hotel Rwanda, for which he
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 0x30981b24f25ef9d02c0d941d3ac86d9332f5dc9e74d643d84607a82f3d186688. 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/8cb92a42-8b5f-4063-a4c0-252d7f816f11.json and https://artists.proofprofile.net/proofs/artist/8cb92a42-8b5f-4063-a4c0-252d7f816f11.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Open Season: Scared Silly (Original Motion Picture Soundtrack)
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 0xef8ab285c36aaf85f61078ce076fa64f2f82aa72640a0d60ebbc16b1f61cc286. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBAYC2101819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4dc381a618b0b605e97e0c3a33bc910dad2d50d0e76b7ab3ac6ac2ae06a29c. 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/GBAJC2000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f93c9d9e1a1d369f54d3706186327c986bab96da5234f6fb19b91bf76f04f4. 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/USJPL1700664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef96aadd0314aa6d365ff84399124db73f94b6b03f2cdb805b4595c58b0ce390. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USJPL1600316.
Back to the Outback (Soundtrack from the Netflix Film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae07c257c136018817d7babccd84540068efe02b10d38a2a3e3f7f5c370ea97. 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/QZ8BZ2101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07819fd0e30b1fc5faad0bb617963c99a8ad0acfb313dfbed1efe55f203f2c31. 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/QZ8BZ2101061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1071dd3b371ed49405569ea09481b4d4d2d1413f57902943d4c87e3157ec520. 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/QZ8BZ2101062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90f30e902f134632b83f9855de704d08cf3eb13e23d06e4baa2afc62a932427. 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/QZ8BZ2101063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa619fa298999a1aeab04f7313e2626fbc766adf75bd427b1377ad17a0e1afc66. 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/QZ8BZ2101064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031ccf38040bc1ea16275f254887ce171d1545ea90965bcace681a15089c264d. 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/QZ8BZ2101065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1584da020497116d365eb67e46cc4197d4b6c6946818cf6da2c553104d9313f0. 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/QZ8BZ2101066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587ae9c4933f13fb2da227995f26819c48435a61a0f6629bf8493e2a103f3f4e. 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/QZ8BZ2101067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5155e96e740e4bced7cac7038f59dc6f3391f236fed02ffc1b6cdbdd88a35344. 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/QZ8BZ2101068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aaaf1bd215e1678fffea6560c00642065d33503d96a16ccd72724e23d84413. 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/QZ8BZ2101069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe362bac0a01afa7e7ed30df6015cc73dda9f64aa47aedc18121ff1fc5fc61e89. 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/QZ8BZ2101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7914c0136e0297bd99191d62259dfb8b0ff59f68d6b367259e437c6f78b438. 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/QZ8BZ2101071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15f1b67be45d39c1dda7f0feceaaa90e858253a602d7cdc4e8dd3b4b26809ff. 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/QZ8BZ2101072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5840b8df52a384f17790eaa67d0112a0eaa51053d7d0dd817e0089edd72d05f. 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/QZ8BZ2101073.