Sicko is a 2007 American political documentary film by filmmaker Michael Moore. Investigating health care in the United States, the film focuses on the country's health insurance and the pharmaceutica
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 0x0fb5f2e1b337784c128089d2768083c75763014b4bf3cdc050934ca80e2735bf. 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/1ac4b0d5-5d35-449e-bd78-f1eaf4d2f50a.json and https://artists.proofprofile.net/proofs/artist/1ac4b0d5-5d35-449e-bd78-f1eaf4d2f50a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x6a6afc1f9db7dc04cfee5b4ced5e4b4b25abfa5418d96f69f7df0cce933b35b9. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZHZ51942442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a8c8600148730993ddf226e36228a8e5fdcdd28dcf95e947bec52c4f6e0803. 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/QZHZ51952667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e44652f10aa3dfc63a842e2047d2553891bf40a360e3a2cd8a4eb33a2a700e. 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/QZNJW2257966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915dc2b46d0faf027b375ea2764e79f981149f5c8bab5f428d232f8c26499bd2. 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/QZNJX2058442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae748def49d322eff078f429914cbb29708c713c2325480cfb67245e9ae490b. 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/QZHZ52146933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c77a7a979c32bce9c58b537709919424a455c08ad8a68cb2bee461daca2d65c. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BKSAT2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545126bd1918548b4cdef72294ee5ae6dcfc29d0ba678e51fa9b1246cc5da38d. 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/BCOXH2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ef8947de9bde894bd3269bca5f09d3992fa531d6f3421a588e88a869ba7d0a. 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/QZWV32376747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c512d6d9cd557ef6e6d9894552281609885064fc86bc50e4c6ed1ca7020c89. 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/QZWV32376753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b05ea00b32f44b4a0be6a2e33062e405365a99c175d7c48ebe91c087fd41c4. 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/QZWV32376774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a697fc95d88a4ba57a9d96319541778df144133c7f17c12b6bd6b44a56dbe28. 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/QZWDE2429669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d5e1f916520127eb28b650f797d2867e58a8b8cc7f058c6ed93eda03c5911d. 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/QZWDE2360803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae8fda391d123111c7eef1ff722d3f733561aa3e2d1ce4449b935e3252a7202. 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/QZWDD2315346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc641e227a7128ed578d5c3cf60bfba0065cdde112547258f3f1568b90b4c116. 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/US7VG2117782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f47552b1fab78bd2a5d54fe3bd00cb83479aca918c993f840aaba2ec717fcb5. 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/QZ5AB2149491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b46c07e6c821ccc7e5fbdbc28853cd3ce809e0806fae2f06a51d92abfad64bf. 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/US7VG2000379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a722fd783e2fbe8210def9fcaea865810df8f3e27f1d49989732ae7a4e537a2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ32025714.