An artel () was any of several types of cooperative associations of workers in pre-revolutionary Russia. In the Soviet Union, the term was applied to production cooperatives. They began centuries ago
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 0xf1c3a17019e169c1914cbf5b1eaea831f9fee1996e00f605888bdff325b1f65b. 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/0dedd57e-760a-4aba-82d2-55a1882287d2.json and https://artists.proofprofile.net/proofs/artist/0dedd57e-760a-4aba-82d2-55a1882287d2.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 0x5f4332d42f1388523a1fce10693d3d9378e3c8cdf2a02e6725bd034047a776ae. 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/FR9W12431514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9b3955d36b7e2111a75bec68e3dcfd8b61639145fa0c275f222ea85aeb6da3. 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/FR9W12431515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0104af525addfc749c1c631bd1e0a4679feb417a217c18e7465dbff9dbe9c0e3. 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/FR9W12431516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d8549bb8ffdea057300996efc0fa9607a8e96f3eb957970b3220af868863bf. 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/FR9W12431517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a323f548c3361c28e6b02217e9775305ccee18d5950489e6df9cab7e76ad12e. 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/FR9W12431518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdd3d258e699750355183ec7de8cb61102d304b7101691e53aa0ab8abc07eaf. 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/FR9W12431519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768aa5caaa98dfdd9b71e4f502a2922b377a29d137b9adf118a0ccf677ca02e4. 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/FR9W12431520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559fd00b8e22fb9c6ec531c42346f60b3c12c54846a6c3f23531cb5798444df2. 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/FR9W12465531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4352905c91b9b286708514246e31660dbb6c3edd7dc0830a72c6f94426c34150. 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/FR9W12455169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5dea7a2831dfb85e30d43e68879cf92b456aca9977d70ebd594560af7d2e12. 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/QZHN82442261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6fd76ed0c72614b38f20595a3cc7f10d937fb29b084279d46bd7f3aeb76c93. 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/QZHN82442262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16813402cac9c8b716e2df685c3c98529b641270bc250ed898d9d75ac2df0765. 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/QZWFH2327300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5695ca21764d5e82cc562ebf7de02e9cbaf8c29c2d86c3a572684c96fc6cec. 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/QZWFH2327301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1a525a271d58f235edd938090060945f10ba9ac672847d6e8cf0fa20edf853. 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/QZWFH2327302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2017f5ea2d1516409499f8298817f768cd38e2733a9d2c2ed8f9e8b2f3b60f. 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/QZWFH2327303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25632e17863e1bad5b07fd04d209e61d0d93a6e7f98f18a7295f5a5db7bcd5b. 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/QZWFH2327304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0491ff2884c3852c08a7257b42e47cb66b1bcf6c668051dc369266f4e21bd145. 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/QZWFH2327305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d87b4e5af70ef23c4ffa6a5889aacc9d5ed1b9372ee2958205ebb3a717ceefc. 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/QZTBB2366947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f95815345068e8c16e814fe4830dea0395cf2e37a13dfa065f3e3c98ec8689c. 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/QZNWQ2310132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357298523601a673668e6e186ba4988e39626a1eecad870f289000c36b4dfdd4. 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/QZK6G2321235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaba6dd691f79d5805e8db5be7199b946a2a5d0c1276da9ca806776a2cd132a. 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/QZNWQ2325138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41f8662024d58bf5b4f413c6c8b4b83419b3bed47a01c1c713dbe541c5501b1. 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/QZNWQ2310133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf227dbfa47c0f026125610edf5cc182714a2894ca2945bbf3bf7f8ae1b5771d0. 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/QZNWQ2310135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357298523601a673668e6e186ba4988e39626a1eecad870f289000c36b4dfdd4. 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/QZK6G2321235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb798252be5e57cfd03155855882474c6591750070031b9844b792427a1a14f. 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/QZHN52391630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11f5c975e8043bc10034196f383de3edd2abe48eb035550198ce57fb1c5c0fc. 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/QZHN52391631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ead67142017d2e38210c6e14b2b2981bba1736f73fdbdaa172e7ab10a8c0e4. 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/QZTB92242803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01fb41be97cb10b138a9eea79d63beb80a1babc697cf12d24a17a835a066b78. 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/QZHN52391633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cbe6faf889a7940336c22d2d8c5076d250b923fc7fbcef279470eddb5a4869. 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/QZHN52391634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed8ec2984fadcdc8d8dfd80cdd30f550d153e719d406eb68cb3bdb1b0b2f95c. 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/QZHN52391635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ead67142017d2e38210c6e14b2b2981bba1736f73fdbdaa172e7ab10a8c0e4. 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/QZTB92242803.