Schmetterlinge ("Butterflies") is a West German film directed by Wolfgang Becker. It won the Golden Leopard at the 1988 Locarno International Film Festival. Reception It won the Golden Leopard at the
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 0x5a90ceda85775f9ef5a6dedefcc46b11a4e4ecb0a9938bd02c0907b9e13b44d0. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d13b819-b3c2-438a-b82b-e49047441fcf.json and https://artists.proofprofile.net/proofs/artist/4d13b819-b3c2-438a-b82b-e49047441fcf.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 0x23db1aaf6b44a016840ac8563509a5015b2dfaaa0f53dc58d010cfe8a1798e19. 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/ATC601350101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b58df1dab4ac054b12e4298c52c907c58a3fcf89820a709598e13f24551753f. 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/ATC601350103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e3bd9536f103ee6c138bc2b70343e0a6a509a7539a79e5582af45693a111ff. 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/ATC601350104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3071cd50dabe0882c67e321b175ef528ff08c55fbd6426cc8d1e0b4be80baf0. 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/ATC601350105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176d106d6ef7d356288780421c53cee453021bf13d0e4346a81acb8ae92aab0b. 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/ATC601350107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1149627c2c8dcf8b676ceaf3e778c387ff6fc7b928d0429d46b6689483af2936. 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/ATC601350108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb47b736285c097bb4e46644526807bedc6e688d02550f7d36a9840bbb7744f. 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/ATC601350109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2993ce18664cb23e5bc43ad37bfb4fa449bd5d4d85177b35de0494e3a6a981. 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/ATC601350110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1b69054a15b79cccc22a750d9210900c1d55562aba2dd61e2a8688f7ba70d6. 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/ATC601350111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8426f3bf0a9efd777b64b5601b9a98c87a1e710e4318b7495f59f53d2e101b49. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ATC601350113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e2ab626814af47416e11394092e08d81891d7af7af5ff73abb5fb61609a113. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ATC601350114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617b2a000ff07c6338db508b7edff61e4357b2be4ba58d596a39a58698b795af. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ATC601350116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1279b6100179397a6932f7a7366697c7a591bce177c9c8c64b27c7b90ce566e5. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ATC601350117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e9c9492bbd17c3680f660ff7a63d0bac708d928c72b582ac1d5b64a4221718. 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/ATC601350120.