Justin Simien is an American filmmaker, actor, and author. His first feature film, Dear White People, won the U.S. Dramatic Special Jury Award for Breakthrough Talent at the 2014 Sundance Film Festiva
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 0x3783393287c6a71aa128d12c289ab76b11e85a4627f40e2c6e955b16c8c6fdf8. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2279b99-bae0-4131-9fdb-935d3a6b2fa2.json and https://artists.proofprofile.net/proofs/artist/e2279b99-bae0-4131-9fdb-935d3a6b2fa2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bad Hair (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 0xd93ec25298b4e5ec8e4b755af5ec59270780ad301dd0e27b8fb5a9a008e4f5d6. 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/USLS52076601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb8a7bf8f190a9a0703e495319c85c93e795a363d889ab3c9cbde37616f4603. 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/USLS52076602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1482899efb6b8e6588272a65f43b14c0b4429e75b4508f1e42eb8dfbc2c334dc. 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/USLS52076603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7705ff98a90a1e3784626f2887d07a323a318bcfccdfe01eff3a1e2e8c941887. 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/USLS52076604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ae241ec888a2c64dbbd51df625f9096e864ae8c522424687aae59298511407. 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/USLS52076605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa882b2ea75349c1d16fbb5cb98791d7b245681e22aa6d22f5b2c06d0f0e041. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USLS52076607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb90cfadc897f9b2c0fec6a0923f5f6ad198c74e2f0e9e2fa5b2fee19cdb121a. 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/USLS52076608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3308a5956ef8723b3a85f06e263dabeb0442121856a934802f4359ff1ef7afc. 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/USLS52076609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d0a85247afc59894ceaabcc329d53aa486831b821f5aa9dd5cc59d1aabd192. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USLS52076610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b3d168973b7bcf50cd45a4d83994c3ff7ea0e1e9d32b06e07b0c1c5d840f57. 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/USLS52076611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec569b668e493f194d32c73162090cbe3e0454ab7a32b284c9df5b96c704c26b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USLS52076612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71003eaad60446747e81a43cae2a977e9047f42953b3e1b5855488765b840ef9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USLS52076613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706017c2ba9b464dcab96f150dadaaacc8796972780a04442caf61def2b95c78. 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/USLS52076614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f3c052ce72dee16bd32bbd8f8ddee72f20eeb68bfbe4846c4720865b3a87be. 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/USLS52076615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060c18b1f571ea30be784be824d969d818b3678aa8ccc31176e96eed2e06545c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USLS52076616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c569bd8df640d413c1eb6e78d98cc3a8b2d7911e0bab80783a3aa76b23615d0. 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/USLS52076618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4de310ff002b29c78fed0742eaa6d9bebf36fe7d77a6c48e5f6c1f7a840c7c. 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/USLS52076619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f2ac6b85d76e8328b1272f01d91ccbeb9dd6863ccf07ef2177adf1f1856fa8. 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/USLS52076621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1565f927c2e29643f6037b983fa8db943a96bc4c619322e0da7ddbe46a64d72. 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/USLS52076622.