Christopher Barnett is a British supervising sound editor, re-recording mixer and music mixer at Skywalker Sound. Filmography The Little Prince (2016) - Supervising Sound Editor Racing Dreams (2009
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 0x5a23e89e6b903c7f727b5fab13ca92f5bb3d6dce184b9e8352d4de026e536a97. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34628d2a-c6ff-47bb-8c4b-9d8e99e61930.json and https://artists.proofprofile.net/proofs/artist/34628d2a-c6ff-47bb-8c4b-9d8e99e61930.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Dose of Happiness (Original Motion Picture Soundtrack)
The First Film (Original Motion Picture Soundtrack)
Postcards from the 48% (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 0xac5df7c5db7e32856279c73d28c138241bc6248d89a40d3fd93385857513b9c6. 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/UKC9D2143002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccb4d2238464d73cecc881ac9e67bf02ae519c089c8f7c742c7a3dd8ec5182b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/UKC9D2143003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2147167dc80f1833cac03ab058fd819e3b0ec7ba233aff541111ecb3afbb3286. 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/UKC9D2143004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb158effe561c238012e1fcd76e92ee78cfde7e368e1310cd42f53698611c771e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/UKC9D2143005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17523c7c2816cb8046c1c6a487c6471fa62f90966aa0862aec021d133148ba1. 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/UKC9D2143007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993e37df8e00a7dac4019266422fd05c6facb9da0733a7318586303f96bbf8ea. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/UKC9D2143008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078563ed1e3964e4addd5b46f39592c3d310d890c3d9db3e24a6484f5da3db61. 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/UKC9D2143009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b42beefe5b4eb4174ff9532acce1083810934ae24589fd1141e9fed0c6e82e. 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/UKC9D2143013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d05e58f739f29150804e5338e7b8bd4c64ef913b405b3f3f309452957774461. 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/UKC9D2143014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2aac29669d52b6099d816664beb01dc5758bf0fb3d8ab2f0c5274f4fed71eb. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/UKC9D2143016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0616bcb0827616eee16da9b905e28c938beab87fea4c79c71d933224e1b885cb. 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/UKC9D2143018.
Getting Away with Murder(s) (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534deb8fed544445c696e2f222071e7f15beafe0b8b170c7ff30b3fe6bc52702. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/UKC9D2145004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a048fb2848044a7cf8c21bba22a052d052d6c5f5916dd873a001afa97d9c10. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/UKC9D2145018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b7c740a4c9d154b268451e913b96db19d2211ddbd65fb1f78079036296e683. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKC9D2145021.
Joy Womack: The White Swan (Original Motion Picture Soundtrack)
Breaking Boundaries (Original Motion Picture Soundtrack)
The Nutcracker, Op. 71: Waltz Of The Flowers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6355b8fe05d4bffdea48c70f15c0ee0db0e0ac60ca4db14d04241b2f56849386. 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/GBARU8900066.