Häxan (, The Witch; Heksen , The Witch; English: The Witches; released in the US in 1968 as Witchcraft Through the Ages) is a 1922 Swedish-Danish silent horror essay film written and directed by Benja
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 0xefb0effb0ad22c15b56e98932765826b4b9ada67fd3fba60d598a32ff9b49e59. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f289411-26a0-4bfb-b897-eb8731c2116f.json and https://artists.proofprofile.net/proofs/artist/3f289411-26a0-4bfb-b897-eb8731c2116f.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 0xe0d22119f3616046b526dde4117bc2d992ed6f7573c31c6f743d2c48094163f3. 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/UKX4Y2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9475dd2c7131ff2f41a99b7648f98efe85a3115799e4c725aaf232db458d6c44. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/UKX4Y2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb585c37cbd159f2fafeb2c77e66cf328b734f2d361074070b46ca4ca172bf2c. 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/UKX4Y2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe56f154dc128634ce61ca8302c78c6d453d3d8401340c9d8419a2a2a356e93c. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/UKX4Y2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb1d0faa68e06e540a6443df93860600f5d650b727611758c8604ec72218a6. 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/UKX4Y2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a0ce4ed320b09d5758040fe0b85ab21dfc6f4c1514c25879986c38efa5bfff. 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/UKX4Y2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce06c84c2c73dc3eb008482ed34d0d809496e107165fc29a8cef0870c76c857b. 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/UKX4Y2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043b039c4f44f39a0c639ac18e092fd40c3b4bf83aa266f5e5e12fe82ad2d4df. 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/GMMA22074306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b29abec586958b9828a69db165fe29b208a2d9dd09986d42fe2ff32556f150. 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/UKX4Y2000009.