Piku is a 2015 Indian Hindi-language comedy drama film directed by Shoojit Sircar, written by Juhi Chaturvedi, and produced by N. P. Singh, Ronnie Lahiri and Sneha Rajani. The film stars Amitabh Bachc
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 0xf93afc7259859876d39f531d44b50b48e31cfbaacb59c14b777915a03aab5769. 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/a433a6bb-ee67-4986-bd1d-9f1abf1769ef.json and https://artists.proofprofile.net/proofs/artist/a433a6bb-ee67-4986-bd1d-9f1abf1769ef.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 0x6769f1341260da3cebaf4f74161256c5b5a23d217faad0c193d3161841103501. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEP2059834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb70b89924b50bea6da6ee7fa18e16654fd50bbcd7fa368bc014a2a393c0cae1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:31Z), 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/QZTAT2104664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57a9456103cc3add33ee097f373d37f1f233d01ae6adde2c2fe43ca414214c9. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:32:55Z), 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/QZES92298769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ace63faa7b3ab85b73d78d998ddc8c1732a6a7dd5e86ee3ff7abe2a6c25e1d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:26:41Z), 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/QZNWX2228542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b450a6908781151bcc0dfd275453ad1be5268df490cc87fbd78d8619bb1e680. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:56:13Z), 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/QZTAZ2299898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98284300d4e244f136dc8a7058960aaefde7cdba0be5c981c449aa0eb07046e6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAZ2299901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6102edb959dc747b6689672f27d63a0f41729d18a49696044037dad8481bc1. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZES62327560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fe7b2b6b8103dfc06fc89fc8721b43953b732957558e52b3979262bcfa846c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZHN72368302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee8728807a6da7799cbc46682ba7066f570c01a849ac52c26b55627a8898215. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWT2326961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bb53b1f1fd7ec67ef06f4537809fd24a86f8445ac0a19e7d6dba8f7440cc8b. 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/US7VG2490108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd6ad135fd7a2335a3f820ee401d8f301b1bf9292a910e2181316b25ac67aa8. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:48:44Z), 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/QZNWQ2452235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b639cb61a8135edacf381deade048fea987f7a782ade5a3a1a607188e5db20. 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/QZTPX2435025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79d97d8c2e80a26b159e87e8a4ce0e2f4461fcb5475ba380782f6b733a5cd9d. 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/ES75E2412354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed976f5ab09f8314cb0f92af0fc8f37b23a58087fd5d4811e2cdac5bb23ed299. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:52:57Z), 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/QZK6G2555801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fce6933cc60c205b84bdaef6339510cacf4fcf0a6fee98e31e15b3bba44b1b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7T2583567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62795734b018e8133a5421648cfc67b346f585905885e7ee8a70b00010ff4ce. 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/TCAIO2440842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94271c804f2bbe247b01813adb3984199c68c0bc8c7335a750bb0e06179716cd. 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/QZW9K2462390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7630693da457e57139e595409d943c086e96ffc4a468ee1b74d9aebf80882107. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZ5AB2343898.
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