High Tension (French: Haute tension, ; also known as Switchblade Romance in some English-speaking countries) is a 2003 French slasher film directed by Alexandre Aja, co-written with Grégory Levasseur,
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 0x7c6ffa27dcad62cdde15cd34272cfbf19d32e664b4f90081f7b9657cb394f991. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a99e93bd-221d-4ae6-af00-546a071b40dd.json and https://artists.proofprofile.net/proofs/artist/a99e93bd-221d-4ae6-af00-546a071b40dd.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 0xf88753f089effaaf00f2eb0fd530fa7e9937361abd1794684e27be2130843e6b. 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/DEF830623002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0bc819b9ba438251549ba30b0a0b838a00dbe74b00ba7dc66773b9abdb162c. 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/USY251667534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff6ddb88af0525c62813d424dfc60e41515ae928cdb94c6cd6d5efbb1ab37bb. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USY251667535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31cde68dd00d903587b6f03892737d5d69b90332e0d30aeb449f991048ee4cf. 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/USY251667536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5347a13cd83226f47157ddc1e12ca3efbde60cd2b3a645ceedf5724b52d96277. 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/USY251667537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935119cf24a021e73ea9d9b1ee3806fe434179c90c54ff370fd65cb3739bacbf. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USY251667538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa89e9fa153f22b4396efc8dd3fec3b8aa0763cd0d0e6cc6ca2160fe8e02e34. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USY251667539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b822ecb4249bcc124f1e0c75a1fa3b8bc239a8b0b4c6644687c7d24af6abfee. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USY251667541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dd2f488c0b9889cbe3016282e5620bd947fae58f369603e01c04ee99e80045. 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/USY251667542.
High Tension / The Insomniac Collective Split