Toby Chu (born 1977) is an American film and television composer and artist of Chinese descent. He wrote the score to Pixar's Oscar-winning animated short Bao. Recent and notable scores include Apple
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 0x28811165b38d65fd81bdf9e358ea31d2b07e766b5f5b758d25548b997b378373. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e28b94de-3549-4064-bc10-992a1c7836c4.json and https://artists.proofprofile.net/proofs/artist/e28b94de-3549-4064-bc10-992a1c7836c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Found (Soundtrack from the Netflix Film)
Fistful Of Vengeance (Soundtrack From The Netflix Film)
Call of Duty®: Modern Warfare II Season 4 (Official Game Soundtrack)
The Monkey King (Soundtrack from the Netflix Film)
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 0x822cb598b290eca5faff672d7d2f72b7a2c85985b4281ac4e1238980a6e16b22. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ8BZ2306211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406c3af99a22d4d2f8978f694048f125591d345aa6f69eefd0c51d93f5c20b2c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ8BZ2306212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ff43a249f51588e9547e56ecedfeda3e839ba9ca0bbc6ab9314709211a81a4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZ8BZ2306213.
Take the World by Storm (from the Netflix Film "The Monkey King")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87610173a9bf77e95d724159e10f065de1e4074cd659f7d4d45601f8812feeb0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ8BZ2306132.
Take the World by Storm (from the Netflix Film "The Monkey King") - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2b5d4f33b086f0a427c4ef2ed72e4b9ce9ce2e787360986fad4057ec3077ef. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZ8BZ2306131.
Stillwater: Vol. 1 (Apple TV+ Original Series Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65f12a0b0c37ef24d3ee62da24435092ac8b6c521333968150a5b13864dd9b1. 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/USJZA2035902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4f0f676b2f99064093af38caf544459b8150ca9faa982bd2c8a3fa5fa6c8fc. 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/USJZA2035903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9e627ce24f96ed63c4bfba5c169b11c2abb8c8bea615ded182407261c2fe13. 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/USJZA2035904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef0139f949c04450a91c6054ac07478ae0b3151cddf18ce3b4b0fbcc9f75d75. 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/USJZA2035905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e028de18017cbaf7357d5510d4b3a2e17e23d3b0b2f4ce23e831c6189bf4518. 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/USJZA2035906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9beb7d2861caeb00dc9af023dab2dc9e2b686c773d90bda9e4b2fb3394084ec2. 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/USJZA2035908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c801dd66336e4af1c32c2ab931c7a1ae7e4d854c424a2d55402b58b40cecc0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USJZA2035909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792aada582cc80cc8a44c71fdde32cc5dc2c01e9839fe08e807e194c267bc341. 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/USJZA2035910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5e2916d489ecb5d0cac355c22acf9687bf1162d7a8d481d590558842b52a09. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USJZA2035911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31a306917c348bcdd014e7318b88f60ff9d58a9189d7ede6834c7e88f35e267. 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/USJZA2035912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd5a46278b492e3cb14caecb4ba0193cbf644bce6a27b8d3fe12718d50fdd9a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USJZA2035913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c1d865ab1525ac894f6ca15ae76520e9d8e1201c5e6696e8b0bc36bbc0a1f1. 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/USJZA2035914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ceb31b60e31c1fe273febffecd8abaffb0d0c4bd7e62f80064eb4b9412b9274. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USJZA2035916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e19489d3e228f49d2e6963e1bb1f6f7bf254226662bbf460960418fe7283e71. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USJZA2035917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8c13b5a0bdb9613a997641e0d0731247304ff92f8ec1aaa5b53f732b951fb9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USJZA2035907.
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 0x21ecd45ecb393e12e578bda7f7599768b5bc419bbbd147d827aaef9167bf9b91. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USJZA2035915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32ca509f1e4855dbd886d88185f65b1ae34232a4fefd0b93a4b12f22cbccb67. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USJZA2035918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38decd4fac77ef436b29e2cb726dc2522fe37dc22a5bb00a2a281357ba924e96. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USJZA2035919.