Kotch is a 1971 American comedy-drama film directed by Jack Lemmon and starring Walter Matthau, Deborah Winters, Felicia Farr (Lemmon's wife), Charles Aidman and Ellen Geer. Adapted by John Paxton fr
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 0xd5829b927fbc4b050aae5ebfa4756b73117d4de8ae41208879d6b7b8fa62bd4a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09a8a937-b854-462f-a01d-ac530f66b19e.json and https://artists.proofprofile.net/proofs/artist/09a8a937-b854-462f-a01d-ac530f66b19e.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 0xa5f455fdca77e4e7b257048096880785f07a3ea66c22d230671677f7a1c8d91a. 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/FR5U18601067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212d51d32027be42f4c2cb66de4a6ced9ba17e36030434b256a46e9998cb9229. 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/FR5U18601068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d66994b64674627f826b1b067c14b14db5010c2bd1b09a591cad0179aba6228. 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/FR5U18601069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24298e7430a993966283f5f73e1d17d4d080ca52b3566d13cef5db5a1c16e663. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR5U18601070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727a0dea6352658bd113d43d3313bbbd3cf132e72692b2a4fa50f1a12a6bd9a6. 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/FR5U18601071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0580b663c9a6c46822b960540c61f9386dbd8d30b3e9756d89345a1c727fb10. 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/FR5U18601072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb4962a50efed20ffc656019673f7bbf1b36636529d01c0f583584b4100602c. 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/FR5U18601073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d8ddf81a3cad0079e2e950aa896c08fa7cc5aff8edc4d7baca00c979f78a3b. 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/FR5U18601074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cefd0277e9fd12d34381ac1143be7f954ceda4476443a016ab8b142bbb2345. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/FR5U18601075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ba5116e0becac5aa1a34ce4b2c749b7dd3b92e9965b5ff685f1c0062d45549. 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/FR5U19100966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0c9527560ed477c51b3746576bd687876096596103f432f73a7b627f4773cc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR5U19100973.
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
Sly & Robbie Present "The Speeding Taxi"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289a44963344b851c1827d4fa5d1cc97126f0c1bd69f9336dd977564fe5492e4. 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/FR5U19300990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39489e8b011b9d6262112e9d71a64b933c6c9c7da1666535e6a658b354d69c87. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR5U19300992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6850a4b175a640f5e557e7632f812eb02d0f2153efe2f8ec7ade7edbb75008. 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/FR5U19300997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4399b32b538a8e01592b6103f8454fa1c96b176e2a36fbbd9ec0f561e81c56fc. 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/FR5U19301007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8a56af07b802e4e5f9d222d3eac7f9f0afaa35f2a18d15352fc4e6226b270b. 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/FR5U19301008.
Reggae Style: Pop Songs Turned Into Jamaican Groove
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e460016acd16d44da858722e8a624dc9f61c39d563a7729ba5d41950944c4ce. 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/FR9W11729390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96993ff27de139ad1b0f24bebaf8a461c4c797282e6a77606bd6ec68d70d4407. 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/FR6F31921340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d9d19e118c28b32680bcfe8a12367a356610a4d0b870012005eaa0f8bc762f. 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/FR6F31921360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb8cc7b66868c0989c3e7446b4b00b4162790fd84e422eb8d87645624e77492. 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/FR6F31700810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc7b290f3ac2d5699c54921f34248e4106685d5a62a6da225f0d97ec387bc1e. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CIA010700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d2576a1eaf405857b7085df3b6cd718289e7c56270d8dc529065aee21c708f. 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/GBCMZ0373254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b44ecc2660d4093906774bc599d81eb4bb0aff6d9039530e819c39a657fe326. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FR6F31921370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a746fac208ec9b474cbe5c0228bbaaaddb33a68fe6429049925b0c863a09e4. 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/FR5U11802803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcd0f20a5c462bef0f38a5f5c6b76e558dd4b0fd233c961f04f3778daf997e2. 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/FR5U11802808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0aaacc4c2b11cf01ac0b2563f799914f99d4423ee8ef9bfc87f35b647644c7. 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/FR5U11802812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a58be164f695ed4bded7b2f3a644d051ecbc5c1001ed917d71d3c8af646d922. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/FR5U11802804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279ec68502e0f745f18ada3358134cf93e033bc38eb2f3c601855432604856f9. 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/FR0Z41619007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6e4d32c48bdc211a0835955e537bdd8f9928953335914639ece21eccee863a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR0Z41619002.
Sly & Robbie Presents "the Speeding Taxi"