thumb|250px|The settlement of the Evens in the Russian Federation for 2010 in % of the total number of this nation in the Russian Federation thumb|400px|Settlement of Evens in the Far Eastern Federal
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 0x17b9ac68a44c2c0bd1aaf6101b6eb1a2523b9e6e9a47c38137bd557d2dbdf7e2. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b131226-97e8-4194-89e6-faf319e87c35.json and https://artists.proofprofile.net/proofs/artist/5b131226-97e8-4194-89e6-faf319e87c35.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 0x087763e17098e17319b806dcbb1e587862d8aa04cd073433895bdc90e1eafb7e. 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/CA5KR1045344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e806ef0e8696fef3862fd75c1d9db034fe55d7af9a10cd52f9d8508c8209a4. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CA5KR1045343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82a1603e8e5da12fc349fde9f9fc9c63fb1c3fad2a7867121c0a22d5bcd30a7. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GBLFP1575278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c624fa2b45512d68cb17e62c61ec77f4210e56d6aa3c7cbad392cbfd35eb27e. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/GBLFP1575279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9576a78795c010e9ce0da011f59d22a8cf9a82a8f76ce42afcd8743a4d036a. 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/GBLFP1668680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c49b18846b1bb4e34da7b472d4f1a43550c526d4f53f34e48c48b3a5789930. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBLFP1668681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cc9767f37cbab9cec8f851227d213c4e31fb375080c1d0a65997577f083ff0. 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/NORYA2004110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f96f9f292475667457d659785bc99e9d66ae2029191bfba5738f270459a7bd. 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/NORYA2004060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390cf47e7668c7080e64acc7c8e3c659bf43ffc7259f78d6b0bbdd917ae7eb2b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NORYA2004050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f0b037dc70e400a52b41bddc542e76097bbbe9852c8827e25c41a88205baf6. 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/NORYA2004120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f96f9f292475667457d659785bc99e9d66ae2029191bfba5738f270459a7bd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NORYA2004060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a714959dd1d9628fa501a40a96ee00fa46acc311b069ad5e5b64719c1cf00f2. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/NORYA2004100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cc9767f37cbab9cec8f851227d213c4e31fb375080c1d0a65997577f083ff0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NORYA2004110.