thumb|right|A shortest path from a Russian word "" (raport) to a word "" (work, labour) found in a thesaurus of the Russian Wiktionary by the Dijkstra's algorithm. A shortest path computation on a gra
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 0xc4a9f717967c6a0079542273cca48ef3cd4e6c2ffeef28fbc907ed926a6211fb. 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/25d15f6d-38b6-436c-8e61-e1173bac7a84.json and https://artists.proofprofile.net/proofs/artist/25d15f6d-38b6-436c-8e61-e1173bac7a84.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 0xba96c288100f604ebd064c57ae48be3e8f6680d1fbbd6ae63eccd1d849e23d24. 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/DKUM72100511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90a08deac5b4b5b13a8d3c65ec68005b9eb92b241b1d1a4196359edd5c5c3c1. 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/DKUM72100512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f32b6e76d02941ecba1ba752a389cca3c982c39c0d7f72b7a06746191abe54. 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/DKUM72100513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56645625f3ea2e53a034bf8a62e66190d3b709cc977571285b5f6d541230fde0. 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/DKUM72100281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1af1fb13224b968d298ee0e8092fdd7941c63b28aab69cb16ffa6fa42d2b93. 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/DKUM72100514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8474ceb2c9fc2c84a7e8b7d5b93f44bd485956fbbc9e5ea957432b4ccc07288. 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/DKUM72000891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7db9789a3082d7412faf93e13bac4a5098e63b2ee3d2d0d3a665663f9d2796. 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/DKUM72100515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cabce98e8b8ed02eedf95206bcbac6d02a5e7fe9f3593c833bbf8419417fa66. 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/DKUM72100516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45842d3ca2350a1c112877c282a44ef018fd453144ecc890e4a8d8987eea4881. 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/DKUM72000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa37b77ae10009bc4a829bb1890085212752f623ab4443589f3d6d2fd2f6c26. 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/DKUM72000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0b0c60a083f65fa8a5525b38a1010d389c82f0dc5687475f23d8434e9fc469. 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/DKUM71900409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9e9f39d1129d56bfb28858234a273d955787af9b82b051f570b907b8922d36. 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/DKUM72000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6153c58ee57563d72288c1ccc4ee145070c503c06a40b6803fd667bc0a11cb. 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/DKUM72000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041fcec3981680d4301f003012bdfdbe46af458499318c187003b4254d232037. 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/DKUM72000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f975ff596ea35ca82aecc27f7113aaa70a418e3d711e86ea967c77643c3ff03. 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/DKUM72000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d591d97129580ab491b589d4ebdebac36c1542dcad3ac38c13a44fa78206d4. 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/DKUM72000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcfd20345d9bb0921518dd909830f00787e2327ef420447728a7f6a31b5b655. 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/DKADG2400269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56645625f3ea2e53a034bf8a62e66190d3b709cc977571285b5f6d541230fde0. 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/DKUM72100281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8474ceb2c9fc2c84a7e8b7d5b93f44bd485956fbbc9e5ea957432b4ccc07288. 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/DKUM72000891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0b0c60a083f65fa8a5525b38a1010d389c82f0dc5687475f23d8434e9fc469. 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/DKUM71900409.