Tuff Turf is a 1985 American drama film directed by Fritz Kiersch and starring James Spader and Kim Richards. The film was released in the United States on January 11, 1985. Producer Donald Borchers
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 0xf84303a396e36e00355d39d0e75f92df47101651825a5472131826333b9b014b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6aac702d-721a-4fd0-9846-93e223bcaf2d.json and https://artists.proofprofile.net/proofs/artist/6aac702d-721a-4fd0-9846-93e223bcaf2d.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 0xe5417ab7d7b04c3470dc7960b9a49bdb46ff4ea555ea5daf1cde0dd84f75cdcd. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAIK2478854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72101171e726ccae9cf2bc440feb8fb04caa5cd3ea1dfbb77f602144601bbebc. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:33:41Z), 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/TCAIK2478863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca83d69980619a538734ee742e1858fd32802dcf148cadc843038e4bd698b313. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCAIK2478865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543fceb097a02b1479f980a53f112214ef37e96ee515df74dbebe4ce35aaf7a7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAIK2478869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6490de0c971e75bef5c08de4415c3d9c6bf8cffe536d55ba4e6a80575f6527d7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIK2478871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d4adf6dc7f2f1295c0a7c482b97757f346502965c521a5172153aa6ed46fed. 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/TCAED1973985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06d51eb7616ede4386956500117c8a2932efe5f2df340df793618d5727b4cb3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAED1973987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d52cf8e7c3b0b6c14255b2d9b432935234dd71edd1c305b96096880f10da775. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAED1973991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf236fd473ba92e3614bdcb91bb99f45cedc4920db6954d9ac00c3b09c6abf6. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:48:17Z), 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/TCAED1973992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ad2636434f1e98808ab1afa9c755899e42db43a289cef7ed13ef8f0f8f3904. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAED1973993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d7e48be796c1c0a37e7f36d72ff9a2d641fb7ecad00f6ba6dc86c5e30f981a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAED1973997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2aab4e3cb9da1ae0f318813a32d0ae6403f9dc4c162f223ff5748f9652f5ab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA72113261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bd1da194faacdb45a71fa737069612f71470ad9bc06300e5328eb65a1b4d1e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDA72113262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0eeffbd5334a76e05cdcf89d84a36fc576af82c92ac8582a39976ac0c5c8c73. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZDA72113267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1494ebe6549a0b6410b2ded02dc0afd8a9fb920062ddfe32d650be46d09743d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA72113268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a5a28d9ffdef7c8b0ebc05fd38e13ac46565a4f5d724b79ea661451f24cfe6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTB82206715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdc5cf967c059b7a86fb35f9be1dc05d003d8951867d319e351c9929b485c5c. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZTB82206716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7075fa3e7a3d035e26250861ba005451ba8820eafe1ba6afcab8f75265122b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB82206717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab10dc87cfca9a7734565937dd0c0e8e527b64e2ecca23326b9441699bbc4e1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB82206719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846e9b52f316d4858260198ef9abd8cd22614f3eb4888a9d3d278965576a0fbf. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB82206720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5492c4aceda72c5b0c64c2af264fd0d0575324412cb2ce038e8ab86c8c786611. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB82206722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86309e62ad04817e6854f0917c094d020411edea6fe8428be073831337570748. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB82206723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53702feaa28aa773ab25071e91a1bf43a654d4ba49059a4cd3a65b750398c36b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB82206724.