Frozen Land () is a 2005 Finnish drama film directed and written by Aku Louhimies starring Jasper Pääkkönen, Mikko Leppilampi and Pamela Tola. The film's plot is based on Leo Tolstoy's 1911 posthumous
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 0x12db14c3b59c595f28157107a1260bc1dc03d7012b70f0b7b1ae7dba8e124e4d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b0f86cf-1c0f-4a50-b660-ade473721f5c.json and https://artists.proofprofile.net/proofs/artist/3b0f86cf-1c0f-4a50-b660-ade473721f5c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048db9b040300cd76f1cc608fc1e5e39f5f46c4adc17a0325370cf7604f71ede. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DER372332801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c3f920a04a8b05357384efd98fe86f32378f097eebb81594682bf90ffb7c73. 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/DER372332802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bbc24c82f3180161994d02fd078d06f4d2672bd790d75a4b6d292d0f6a7b83. 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/DER372332803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1900812b38863a2d3481e3780cfaf026cec1f53c5263f030bfe4ada9cb9e1aa2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DER372332805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46eb5c00adf91e137712a3629a2033cf292c1dc57762d12cbc8ecbb75a940d1f. 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/DER372332806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77318b784d1c0e0d23517279a42d316579cd4b71b88147378bcb3eb851ed68a0. 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/DER372332807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b30fc819e6a80ef7988314d97338697c6eec5e1552ee9c7a86a485b01447e0c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DER372332808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87962fa556fe6cda81b84fa7c507c6d3d8de2839ef3c2dfbe2b65dcde11e0a1f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:00:42Z), 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/DER372332804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b4ebd41da0c53d79fc112626c9cbaa606957ea4f9f6e354d73e6ff1f9ba798. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DER371805601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3675e3e9bc0633878ae376231ab278fa82efe355ab0d076a283ce26d11f0135. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DER371805602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5f9d75b3c7818bcf9543d12c5ae6b4c5af6865c2558133ff333f2250157368. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DER371805603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c82a288f52f3b191d9117235486b0bb58fce7f035b72ef863124a2388db2e5. 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/DER371805604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9d644ca35ce9ac3beac8d00e818bbd7643ba28e5fac98f4748316d5657d503. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DER371805605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515fab81289989b79cd3dddaf03c07f9ccace8e208cafe2c777d5591fcf7338b. 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/DER371805606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba9d60494a9c6b01cd6a29e9a220b3b9eb22091c21a64916292b79723a55deb. 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/DER371805607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33ba376cc04a9ceb4cb1207fd563d69b8151960e388baada69cf2c04455eb7a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DER371805608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709ff55e3c748baab86b86ec05d06241b1c766210347023500ad0d2a43e92619. 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/DER371805609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dec5b23427a9f40066b14686d4d886c03fbc8e4538f096a0b2c6aa375673c5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DER371805610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048db9b040300cd76f1cc608fc1e5e39f5f46c4adc17a0325370cf7604f71ede. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DER372332801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048db9b040300cd76f1cc608fc1e5e39f5f46c4adc17a0325370cf7604f71ede. 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/DER372332801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3675e3e9bc0633878ae376231ab278fa82efe355ab0d076a283ce26d11f0135. 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/DER371805602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33ba376cc04a9ceb4cb1207fd563d69b8151960e388baada69cf2c04455eb7a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DER371805608.