Zep or ZEP may refer to: Zep (cartoonist) (real name Philippe Chappuis), the creator of comics character Titeuf Zep, Inc., cleaning products company Zeaxanthin epoxidase Jo Jo Zep of Australian ba
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 0xdeeecfaf33404df20be5de7ca23e60e409e978021bf818c2da9a4af61de5b24a. 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/97d9bea2-fc67-48d0-a750-57a3eecfc5ab.json and https://artists.proofprofile.net/proofs/artist/97d9bea2-fc67-48d0-a750-57a3eecfc5ab.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 0x67c4492c0346d727ce0089d8f4cd7e78ed6272697bf7a0e026435b5d50f274c4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES82304308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d800b2ead74bc4195e88e191d18704b1f684d401796618aa5fbb8ba5e95b32c. 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/QZTB92233358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4889bd6fa69dfdf0e4e639708a0c595ad7982835f32c01efa531d06676565912. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDA52325012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98453c73c6d34524548cca5c1dfd8c0302aea39193abec280fd1cde7e6c6e3a6. 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/QZTB62222978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a9c20dcb85066ecbce1753dd22458b057dae45a03ed7175efbf022bbc492d3. 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/QZNWS2255650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012bd4a2427331e592defd68a6ad2fbe00a7e55f9653f0836597dd0864711f92. 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/QZMEP2294610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4f9a1382879f6cd69673238cf1acb9eca476c5415748692a4f740bd4ba4b6b. 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/QZMEN2289071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31fe91d9ca2434b9418089af57497e0f106d537180a997fecaafa4d5ddc9083. 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/QZMEM2248588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e31451dc7dbf0709242e4dd9eadd1e8c6746c369bd7fd04f20e3699a076baac. 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/QZMEM2248587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437a648f17eff2c861af07eb2a4a00e8fd14ebb8abe4f624037517266525443d. 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/QZMEM2245713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedea8c898b377847886455edab37bbdde36de647b9c724ca2377f03e405305a1. 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/QZNWW2109008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038f5b5e7a483c2aea960a063eff7f8fa4b9f2b632ce53b12f9b7e9967c9b694. 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/QZNWU2162125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad8ad68f87b79295958d92ef5f26ae87b8c3dc3cad8047ac80f7b99d2ffe409. 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/QZNWU2162123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7121f4b9260201dbdbc4c3f60f07cb3acf361a04821463a3164593463f2d04. 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/QZNWU2162122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb180f4170b77197b3b32455488154b230360dd29efd91f885fb706394ca2d3c. 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/QZNWU2162121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f47699dfccb8f811703ae4e19ca97314923f06d4328d1e9c75784cab2379d34. 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/QZNWU2161268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824115caf82d410f56b8bf9bab0614571e2398bed707eb46b310648cb2c440eb. 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/QZNWS2129440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6c019e54f423785e1fa1ad94c165c42dc740922eb0b3fccd3307153b9bd2c7. 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/QZNWS2104821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bf866d352ed8dcce2852afdce554759460814d9276eec0c9aa659bba91c00b. 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/QZK6P2115059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf930eacd742dc70ca5a9a710c66dbd3134bdf78f8772f5dba4d1af5836cd80b. 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/QZHNC2142853.