Chumbak (also designated as Chumbak - THE LOTTERY) is a 2018 Indian Marathi-language slice of life drama film directed by Sandeep Modi, produced by Aruna Bhatia, Naren Kumar and Cape of Good Films and
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 0x394fc99ce310b5e33f6ee30bfff1973a61adf60aca6d57a93bfa7ea8b460ed1c. 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/9202cfe8-9d5a-4bca-8f9e-17b677c8263f.json and https://artists.proofprofile.net/proofs/artist/9202cfe8-9d5a-4bca-8f9e-17b677c8263f.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 0xc573e742a1ce71172a30b084ee229b6bfa0be945bb23698b08cd5fe12f9cb6de. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZQAY2336287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6928a9152b2022be9b31b5ad19ca5d4b15256515d0a05ce363e3f7e004d7de33. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:40:19Z), 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/QZQAY2362330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff3bbc1760c7fcf22cb811d818d05dcb4254b2aaf99bc74bfd329c3d854e022. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZS7J2327579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613afda6b1b9445c8e176fadf29c5b9e50c069c740ea38d70298ae8adb7822c2. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZS7J2388991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc51c8961bdd5c01dc1ebda0ec4a180b7c57ed8b5fc15f6c5e78060c50dcc1cf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZS7J2382013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0937e8bcf7e1991a240a76062d9bb7307e7ad3d040caabc025a8171861fb83. 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/QZFZ72492642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcce5e3162b985bed2f5b8c608c92a79942e8547e5b823433fd625a6c6dd252. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZFZ62446939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f7a35d81d101fe5310d955a58dc40a0948a8460d438fafe066839c2ea00d39. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTBB2488460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3557da7c1a255582851a76af20dfcab268fd97c119d68ef0299467908bfa4909. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZWFW2485384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea39519b8ae73f96d2ffe70a22c295a719e712c3ed8b6bc016ade0a1498e494f. 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/QZDA52589716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa916cbde669f0168d01d811f37570326d45c77d8729dab062914e8ed8824e457. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN92516073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c37f6201634abab3d65b5c387c7d542840f77f2cd009a55bca8f94dd9df63e4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6Q2558758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f7a35d81d101fe5310d955a58dc40a0948a8460d438fafe066839c2ea00d39. 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/QZTBB2488460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c37f6201634abab3d65b5c387c7d542840f77f2cd009a55bca8f94dd9df63e4. 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/QZK6Q2558758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa916cbde669f0168d01d811f37570326d45c77d8729dab062914e8ed8824e457. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHN92516073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea39519b8ae73f96d2ffe70a22c295a719e712c3ed8b6bc016ade0a1498e494f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA52589716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe164c95cae19c0495680a325cc0b1ec368b67278466202053faf18de0cf93246. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZWDW2585331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0a7a4357d8574c00fb42a6113b9ca155f5705bfa135d4af6798e9bfa778943. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZYFZ2511998.